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Dean J, East I, Shimizu S. Biosynthesis of the mouse zona pellucida and the effect of anti-zona monoclonal antibodies on fertilization and early development. Theriogenology 1986. [DOI: 10.1016/0093-691x(86)90187-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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227
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Dean J, East IJ. Effects of anti-zona pellucida monoclonal antibodies on fertilization and early development. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1986; 207:37-53. [PMID: 3825684 DOI: 10.1007/978-1-4613-2255-9_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The murine zona pellucida surrounds the growing oocyte, ovulated egg and dividing embryo. It is comprised of three sulfated glycoproteins designated ZP-1, ZP-2, and ZP-3 which have molecular weights of 185,000, 140,000 and 83,000 daltons respectively. We have isolated a series of cell lines that produce monoclonal antibodies to ZP-2 and to ZP-3. These immunogical probes indicate that the extracellular matrix proteins of the zona pellucida are found uniquely in the ovary where they surround maturing oocytes. We have demonstrated that passive immunization with antibodies specific either for ZP-2 or ZP-3 inhibit in vivo and in vitro fertilization. This effect is observed with ng/ml quantities of antibody. It appears that the antibodies do not preclude sperm binding but rather prevent sperm penetration of the zona by steric hinderance. Although long-term, the contraceptive effect is fully reversible and this reversibility is associated with loss of antibody from the zona pellucida surrounding intra-ovarian oocytes. Antibodies to ZP-2 or ZP-3 had no other adverse effect on in vivo or in vitro preimplantation development.
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228
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Dean J, Edwards DG. The availability to the rat of energy from various diet ingredients. Lab Anim 1985; 19:305-10. [PMID: 4068658 DOI: 10.1258/002367785780887383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The digestible and metabolizable energy values of 8 ingredients commonly used in laboratory animal diets were determined using the growing male rat, by the total collection method. Each ingredient was incorporated into a basal diet of maize, wheat, soyabean meal and fishmeal. The metabolizable energy values, on a dry matter basis, corrected to the nitrogen retention of the basal diet for rats per 100 g bodyweight were as follows: maize 15.23 MJ/kg, extracted soyabean meal 14.11 MJ/kg, barley 12.31 MJ/kg, wheat 14.09 MJ/kg, oatfeed 1.36 MJ/kg, white fishmeal 11.61 MJ/kg, dried skimmed milk 14.32 MJ/kg, casein 17.91 MJ/kg. Additional analytical data for the 8 ingredients are also given.
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229
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Edwards DG, Dean J. The responses of rats to various combinations of energy and protein. II. Diets made from natural ingredients. Lab Anim 1985; 19:336-43. [PMID: 4068662 DOI: 10.1258/002367785780887356] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Natural diets with metabolizable energy levels of 8.5, 10.0, 11.5 or 13.0 MJ/kg and protein:energy ratios of 1:1, 1.33:1, 1.67:1 or 2:1 %:MJ/kg were fed ad libitum for 28 days to male and female weanling rats. Records of food intake and bodyweight were maintained weekly, and at post mortem examination body length, abdominal fat, liver and kidney weights were measured. Food intake was reduced when dietary energy level increased but this reduction was not sufficient to prevent energy intake increasing, especially in males. Female rats showed only small increases in energy intakes as dietary energy levels rose. The increase in energy intake at higher dietary energy levels increased food conversion efficiency, weight gain and abdominal fat deposition. The responses of male rats were greater than females. Protein intake had a smaller and less consistent effect than energy intake. Increased protein:energy ratio resulted in higher absolute and relative liver and kidney weights and greater body length. This reflected the increase of bodyweight gain at higher protein:energy ratios.
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230
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Edwards DG, Porter PD, Dean J. The responses of rats to various combinations of energy and protein. I. Diets made from purified ingredients. Lab Anim 1985; 19:328-35. [PMID: 4068661 DOI: 10.1258/002367785780887392] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Male and female weanling rats were fed ad libitum for 28 days on purified diets with metabolizable energy levels of 8.0, 9.5, 11.0 or 12.5 MJ/kg and protein:energy ratios of 1:1, 1.33:1, 1.67:1 or 2:1 %:MJ/kg at each energy level. Major nutrients were balanced in proportion to energy and protein. The following parameters were measured: food intake, bodyweight, body length, abdominal fat, liver and kidney weights. Increasing dietary energy level reduced food intake but the reduction was not sufficient to prevent an increase in energy intake. This was reflected by increases in bodyweight, body length, abdominal fat, and relative liver and kidney weights, especially in male rats. Higher energy intake increased weight gain and food conversion efficiency to a greater extent than higher protein intake. The response to protein intake at different energy levels was not consistent. There was no common protein:energy ratio for overall good performance. It is concluded that rat growth and other features can be controlled by the alteration of dietary energy and protein levels.
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231
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Dean J, Edwards DG. The nutritional value of rat diets of differing energy and protein levels when subjected to physical processing. Lab Anim 1985; 19:311-9. [PMID: 4068659 DOI: 10.1258/002367785780887400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
4 diets formulated to contain 8.5, 10.0, 11.5 and 12.5 MJ/kg metabolizable energy and 85, 133, 192 and 250 g/kg of protein respectively were prepared in 3 physical forms: meal, reground pellets or reground expanded and fed to growing rats from 28 to 56 days of age. Food intake was increased by pelleting and expanding in lower energy diets, whereas these differences tended to disappear in the higher energy diets. Growth and food conversion efficiencies showed a similar pattern, with the greatest differences evident in the low energy diets. Male rats showed greater differences than females in all parameters measured. Expanding the diet improved the microbiological status over pelleting both being superior to unprocessed meal. Measurements of digestible and metabolizable energy values of the 8.5 and 12.5 MJ/kg diets revealed consistent decreases in energy availability following processing. This suggested that the observed growth responses were due mainly to increased food intake coupled with increased nitrogen retention.
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232
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Dean J. A multivariant assessment and treatment technique for alcohol problems. THE INTERNATIONAL JOURNAL OF THE ADDICTIONS 1985; 20:1281-90. [PMID: 4077324 DOI: 10.3109/10826088509056364] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Traditional alcohol treatment systems employ a binary procedure in the assessment and treatment of alcohol problems. The binary approach has come under critical review and an alternative multivariant approach has been suggested. The purpose of this paper is to propose a multivariant design developed in clinical practice. The goals of the presentation are to stimulate concern for multivariant techniques and to assess their impact on treatment outcome.
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233
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East IJ, Gulyas BJ, Dean J. Monoclonal antibodies to the murine zona pellucida protein with sperm receptor activity: effects on fertilization and early development. Dev Biol 1985; 109:268-73. [PMID: 3996750 DOI: 10.1016/0012-1606(85)90454-3] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
During development and maturation, mammalian oocytes are surrounded by the zona pellucida which in the mouse is comprised of three sulfated glycoproteins, ZP-1, ZP-2, and ZP-3. Previously, monoclonal antibodies to ZP-2 have been isolated. The isolation and characterization of monoclonal antibodies specific for ZP-3, the zona protein with sperm receptor activity are now reported. Following passive immunization, these monoclonal antibodies localize to the intraovarian zonae pellucidae and their presence precludes both in vivo and in vitro fertilization of subsequently ovulated eggs. Monoclonal antibodies specific for either ZP-2 or ZP-3 also completely block in vitro fertilization at relatively low concentration ranging from 0.4 to 75 micrograms/ml. The contraceptive effect requires the presence of the zona and appears to inhibit the penetration of the zona pellucida by sperm rather than by blocking the sperm binding site. Neither antibody interferes with in vitro development from the two-cell to the blastocyst stage or with subsequent hatching from the enveloping zona pellucida.
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234
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East IJ, Keenan AM, Larson SM, Dean J. Scintigraphy of normal mouse ovaries with monoclonal antibodies to ZP-2, the major zona pellucida protein. Science 1984; 225:938-41. [PMID: 6474160 DOI: 10.1126/science.6474160] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The zona pellucida is an extracellular glycocalyx, made of three sulfated glycoproteins, that surrounds mammalian oocytes. Parenterally administered monoclonal antibodies specific for ZP-2, the most abundant zona protein, localize in the zona pellucida. When labeled with iodine-125, these monoclonal antibodies demonstrate a remarkably high target-to-nontarget tissue ratio and provide clear external radioimaging of ovarian tissue.
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235
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East IJ, Mattison DR, Dean J. Monoclonal antibodies to the major protein of the murine zona pellucida: effects on fertilization and early development. Dev Biol 1984; 104:49-56. [PMID: 6376213 DOI: 10.1016/0012-1606(84)90035-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The growing murine oocyte is surrounded by an extracellular zona pellucida consisting of three sulfated glycoproteins, ZP-1, ZP-2, and ZP-3. The smallest of these, ZP-3, has been reported to be the species-specific sperm receptor. Monoclonal antibodies have been recently characterized to three different antigenic determinants, two found exclusively on ZP-2, and one found on both ZP-2 and ZP-3. The in vivo effect of these antibodies on the three known functions of the zona pellucida were examined. The most dramatic effect was the prevention of fertilization. After administration, the monoclonal antibodies were located in the ovary on the zona pellucida of growing oocytes. Eggs ovulated subsequently were coated with the monoclonal antibodies and failed to develop into 2-cell embryos after mating. Eighty days later, the monoclonal antibodies could no longer be detected on the zona of ovarian oocytes, and this loss coincided with the resumption of fertility. These findings provide molecular evidence for the hypothesis that the immunological block to sperm-egg binding need not involve antibody specific for the sperm receptor, and that antibodies to the zona pellucida block sperm access by steric hinderance. Other known functions of the zona were unaffected. The antibodies were unable to induce the biochemical changes in the zona associated with the postfertilization block to polyspermy and had no detectable effect on preimplantation development.
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237
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Shmerling DH, Wicks ACB, Dean J. Points: Guide wire manipulation of Crosby jejunal biopsy capsule under fluoroscopic control. West J Med 1984. [DOI: 10.1136/bmj.288.6421.939-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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238
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East IJ, Dean J. Monoclonal antibodies as probes of the distribution of ZP-2, the major sulfated glycoprotein of the murine zona pellucida. J Cell Biol 1984; 98:795-800. [PMID: 6699085 PMCID: PMC2113130 DOI: 10.1083/jcb.98.3.795] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Three sulfated glycoproteins (ZP-1, ZP-2, and ZP-3) make up the zona pellucida, an extracellular glycocalyx that surrounds mouse oocytes. We have produced five monoclonal antibodies specific to the zona. All five immunoprecipitated ZP-2, and in addition, two of the antibodies immunoprecipitated ZP-3. This suggests the presence of either a common antigenic site or one made up in part by each of the two glycoproteins. The monoclonal antibodies bound to approximately 1.3 X 10(8) binding sites per ovulated mouse egg which represents 2% of the total number of ZP-2 molecules present in the zona. ZP-2 appeared to be present throughout the zona and indirect immunofluorescence revealed a fibrous pattern with no evidence of localization. Furthermore, this pattern of distribution, which was identical for all five monoclones, remained constant after fertilization at the two-cell embryo stage. Laser photobleaching demonstrated that ZP-2 is stably integrated in the extracellular matrix of the zona pellucida. No mouse tissue other than the ovary contained ZP-2 and ZP-2 is antigenically distinct from other previously described extracellular matrix proteins.
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239
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Gardiner GA, Dean J. Large solitary gallbladder calculus resembling multipolypoid cholesterolosis: case report. GASTROINTESTINAL RADIOLOGY 1983; 8:337-9. [PMID: 6642149 DOI: 10.1007/bf01948146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A condition diagnosed as multiple cholesterolosis was discovered at surgery to be caused by a very unusual large solitary gallstone. This case demonstrates the potential hazard of omitting the plain KUB film and provides another possible etiology for the appearance of multiple fixed intraluminal defects on oral cholecystography.
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240
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Dean J. Decondensation of mouse sperm chromatin and reassembly into nucleosomes mediated by polyglutamic acid in vitro. Dev Biol 1983; 99:210-6. [PMID: 6194029 DOI: 10.1016/0012-1606(83)90269-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The organization of the mammalian sperm nucleus was probed with staphylococcal nuclease. Although isolated nuclei are resistant to cleavage, following reduction and alkylation, 30% of the sperm DNA could be digested and the remaining DNA had a heterodisperse size distribution. By morphological criteria, a model acidic protein, polyglutamic acid was capable of decondensing purified sperm nuclei that had been reduced and alkylated. The maximal extent of nuclease digestion increased to 85-90%. The subsequent addition of purified, exogenous core histones in 0.1 M NaCl partially reversed this vulnerability to nuclease cleavage such that only 55% of the DNA was digested. Furthermore, analysis of the remaining DNA revealed a nucleosome ladder pattern with unit length repeat of 150 bp. These results strongly suggest that polyglutamic acid can mediate not only decondensation of sperm nuclei but also the assembly of sperm chromatin into nucleosomes.
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241
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Shimizu S, Tsuji M, Dean J. In vitro biosynthesis of three sulfated glycoproteins of murine zonae pellucidae by oocytes grown in follicle culture. J Biol Chem 1983; 258:5858-63. [PMID: 6853551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The zona pellucida is an extracellular glycocalyx that surrounds the growing oocyte and mediates specific biological functions essential to early mammalian development. We have isolated by a novel technique intact zonae pellucidae from a murine follicle culture system which mimics in vivo granulosa cell-oocyte interactions. Using radioactive precursors we have demonstrated that all three zona proteins, ZP-1, ZP-2, and ZP-3, are sulfated glycoproteins. Incubation of the follicle culture with tunicamycin (0.5 microgram/ml), an antibiotic that blocks N-glycosylation, inhibits new protein deposition in the zona. Under these same conditions overall protein synthesis is decreased only 30%. Biosynthetic studies indicate that after 6 days in culture the zona proteins are produced at 0.4 pg/oocyte/h, which represents 2-3% of the total oocyte protein synthesis. This synthesis stops at or before ovulation and the extremely long half-life (greater than 100 h) of the zona may be essential to preserve its known biological functions, all of which occur after ovulation.
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242
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Shimizu S, Ito M, Dean J. Glycoproteins of mouse zona pellucida: analysis of their reactivity to lectins. Biochem Biophys Res Commun 1982; 109:449-54. [PMID: 7181927 DOI: 10.1016/0006-291x(82)91742-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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243
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Brown FR, Holbrook KA, Byers PH, Stewart D, Dean J, Pyeritz RE. Cutis laxa. THE JOHNS HOPKINS MEDICAL JOURNAL 1982; 150:148-53. [PMID: 7062577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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244
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Dean J, Wendler G. Stick insects walking on a wheel: Perturbations induced by obstruction of leg protraction. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1982. [DOI: 10.1007/bf00619126] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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245
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Wenk ML, Ward JM, Reznik G, Dean J. Effects of three retinoids on colon adenocarcinomas, sarcomas and hyperplastic polyps induced by intrarectal N-methyl-N-nitrosourea administration in male F344 rats. Carcinogenesis 1981; 2:1161-6. [PMID: 7318152 DOI: 10.1093/carcin/2.11.1161] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Male F344 rats, 9 weeks of age, were given multiple intrarectal administrations of N-methyl-N-nitrosourea (NMU) at 0.5 mg/dose twice a week for a total of 8, 12, or 16 doses. Five days after the final NMU instillation, rats were placed on one of four diets; chow with retinoid vehicle, chow with 654 mg N-ethylretinamide per kg diet, chow with 686 mg N-(2-hydroxethyl)retinamide per kg diet, or 406 mg retinylidene dimedone per kg diet. Groups of 40--50 rats receiving 16, 12, or 8 total doses were sacrificed 32, 44, or 52 weeks after the initial NMU dose, respectively. The number of rats with colon tumors and the number of tumors per tumor bearing rat in each dosage regimen was compared to appropriate controls. Organ weights for testis, liver, and kidneys were similar for controls and retinoid treated animals and no histopathologic lesions indicative of retinoid toxicity were found. Unusual proliferative lesions of the colon in rats of all dosed groups included hyperplastic and inflammatory polyps and sarcomas. The feeding of diets containing these three retinoids did not significantly modify the incidence or multiplicity of colon tumors observed under these conditions.
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246
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Dean J. It's annual report time. PROFILES IN HOSPITAL MARKETING 1980:66-71. [PMID: 10253275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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247
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Tack BF, Dean J, Eilat D, Lorenz PE, Schechter AN. Tritium labeling of proteins to high specific radioactivity by reduction methylation. J Biol Chem 1980; 255:8842-7. [PMID: 6773951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The third component of human complement, hemoglobin A2, and IgG have been radiolabeled with tritium to specific activities of 179, 103, and 89 Ci/mmol, respectively, by reductive methylation. The labeling procedure is mild, requiring only brief exposure to formaldehyde (10 to 12 mM) and tritiated sodium borohydride (3 to 5 mM), and specific for the alpha amino groups of NH2-terminal residues and epsilon-amino groups of lysyl residues. The extent of modification for each protein ranged between 5 and 16% at available amino groups based on a stoichiometric reactivity of 2 mol of formaldehyde/mol of primary amine. Although the degree of substitution required to obtain these specific activities was high, no significant loss of antigenic or biological activities was apparent. Each labeled protein was 90 to 95% precipitable with antiserum elicited to the unreacted protein. The hemolytic activity of C3 was reduced by only 16%; the oxygen affinity of HbA2 was minimally decreased, and the phosphorylcholine binding affinity of an IgA myeloma protein (TEPC-15) was not significantly affected. Precise double antibody radioimmunoassays were developed with each tritiated protein capable of detecting less than 10(-8) g of antigen. Labeled protein samples have been stored for time periods up to 1 year without appreciable deterioration.
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248
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Dean J, Schechter AN. Conformation-specific antibodies to the alpha chain COOH terminus of hemoglobin A0. J Biol Chem 1979; 254:9185-93. [PMID: 113408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
An anti-hemoglobin antiserum obtained from a sheep immunized with human carboxyhemoglobin A0 demonstrated little difference in its reactivity with deoxy- or carboxyhemoglobin A0. However, a subpopulation of this antiserum isolated by synthetic peptide affinity chromatography clearly distinguished between these two hemoglobin species. This subpopulation, designated alpha(129-141) anti-hemoglobin antibodies, represents less than 1% of the total anti-hemoglobin antibodies. They are nonprecipitating by Ouchterlony analysis, and fluorescence-quenching studies demonstrate the interaction of a single antibody binding site per hemoglobin dimer. These antibodies bind preferentially to carboxyhemoglobin with a median affinity constant of 5 X 10(8) M-1 compared to binding to deoxyhemoglobin with a binding affinity of less than 1 X 10(8) M-1. Furthermore, the presence of these antibodies in stoichiometric amounts increases the oxygen affinity of hemoglobin, and thus antibody and oxygen binding to hemoglobin can be considered as a linked function.
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249
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250
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Dean J, Schechter A. Conformation-specific antibodies to the alpha chain COOH terminus of hemoglobin A0. J Biol Chem 1979. [DOI: 10.1016/s0021-9258(19)86828-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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