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Redefinition to bilayer osmotic pump tablets as subterranean river system within mini-earth via three-dimensional structure mechanism. Acta Pharm Sin B 2022; 12:2568-2577. [PMID: 35646529 PMCID: PMC9136608 DOI: 10.1016/j.apsb.2021.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/11/2021] [Accepted: 10/24/2021] [Indexed: 11/24/2022] Open
Abstract
Defining and visualizing the three-dimensional (3D) structures of pharmaceuticals provides a new and important tool to elucidate the phenomenal behavior and underlying mechanisms of drug delivery systems. The mechanism of drug release from complex structured dosage forms, such as bilayer osmotic pump tablets, has not been investigated widely for most solid 3D structures. In this study, bilayer osmotic pump tablets undergoing dissolution, as well as after dissolution in a desiccated solid state were examined, and visualized by synchrotron radiation micro-computed tomography (SR-μCT). In situ formed 3D structures at different in vitro drug release states were characterized comprehensively. A distinct movement pattern of NaCl crystals from the push layer to the drug layer was observed, beneath the semi-permeable coating in the desiccated tablet samples. The 3D structures at different dissolution time revealed that the pushing upsurge in the bilayer osmotic pump tablet was directed via peripheral "roadways". Typically, different regions of the osmotic front, infiltration region, and dormant region were classified in the push layer during the dissolution of drug from tablet samples. According to the observed 3D microstructures, a "subterranean river model" for the drug release mechanism has been defined to explain the drug release mechanism.
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Desai N, Purohit R. Design and Development of Clopidogrel Bisulfate Gastroretentive Osmotic Formulation Using Quality by Design Tools. AAPS PharmSciTech 2017; 18:2626-2638. [PMID: 28247292 DOI: 10.1208/s12249-017-0731-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 01/27/2017] [Indexed: 02/06/2023] Open
Abstract
Clopidogrel bisulfate (CBS) is antiplatelet drug and it is becoming a drug of choice in the treatment and management of prevention of heart attacks and strokes. CBS is stable and soluble in acidic pH; therefore, retention in stomach for prolonged period appears to be beneficial for controlling the bioavailability. The gastroretentive osmotic system (GROS) facilitates prolonged retention of drug in stomach and provides zero-order drug release. A complex formulation like GROS poses many challenges, and QbD tools can help in designing robust formulation which takes all aspects of product and process development in order to deliver a robust product. The GROS was formulated in three steps: core tablet, osmotic tablet, and gastroretentive osmotic tablet. The design of experiment was used for screening and optimization of formulation and process-related parameters. The dissolution study was carried out to analyze the release pattern of tablet. The optimized batch O-4 showed cumulative drug release of 19.43, 30.49, 64.41, and 85.11% at 2, 4, 8, and 12 h which is in the range of QTPP predictions. The novel technique of GROS was implemented successfully which demonstrates robust design giving consistent and desired results.
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Dumitriu S, Popa M, Dumitriu M. Review : Polymeric Biomaterials As Enzyme and Drug Carriers* Part III: Polymeric Drugs and Drug Delivery Systems. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391158900400107] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
| | - Marcel Popa
- Polytechnic Institute of Jassy Jassy, Romania
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Yang Y, Zhao Z, Wang Y, Yang L, Liu D, Yang X, Pan W. A novel asymmetric membrane osmotic pump capsule with in situ formed delivery orifices for controlled release of gliclazide solid dispersion system. Int J Pharm 2016; 506:340-50. [PMID: 27132166 DOI: 10.1016/j.ijpharm.2016.04.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 04/07/2016] [Accepted: 04/25/2016] [Indexed: 10/21/2022]
Abstract
In this study, a novel asymmetric membrane osmotic pump capsule of gliclazide (GLC) solid dispersion was developed to achieve a controlled drug release. The capsule shells were obtained by wet phase inversion process using cellulose acetate as semi-permeable membrane, glycerol and kolliphor P188 as pore formers, then filled with the mixture of GLC solid dispersion and pH modifiers. Differentiate from the conventional formulations, sodium carbonate was chosen as the osmotic agent and effervescent agent simultaneously to control the drug release, instead of the polymer materials. The ternary solid dispersion of GLC, with polyethylene glycol 6000 and kolliphor P188 as carriers, was prepared by solvent-evaporation method, realizing a 2.09-fold increment in solubility and dissolution rate in comparison with unprocessed GLC. Influence of the composition of the coating solution and pH modifiers on the drug release from the asymmetric membrane capsule (AMC) was investigated. The ultimate cumulative release of the optimal formulation reached 91.32% in an approximately zero-order manner. The osmotic pressure test and dye test were conducted to validate the drug release mechanism from the AMC. The in vivo pharmacokinetic study of the AMC indicated a 102.66±10.95% relative bioavailability compared with the commercial tablet, suggesting the bioequivalence between the two formulations. Consequently, the novel controlled delivery system with combination of solid dispersion and AMC system is capable of providing a satisfactory alternative to release the water-insoluble drugs in a controlled manner.
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Affiliation(s)
- Yue Yang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Zhinan Zhao
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Yongfei Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Lu Yang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Dandan Liu
- School of Biomedical & Chemical Engineering, Liaoning Institute of Science and Technology, Benxi 117004, PR China
| | - Xinggang Yang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
| | - Weisan Pan
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
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Application of Box–Behnken Design to Optimize the Osmotic Drug Delivery System of Metoprolol Succinate and its In Vivo Evaluation in Beagle Dogs. J Pharm Innov 2016. [DOI: 10.1007/s12247-016-9245-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Zhao Z, Wu C, Zhao Y, Hao Y, Liu Y, Zhao W. Development of an oral push-pull osmotic pump of fenofibrate-loaded mesoporous silica nanoparticles. Int J Nanomedicine 2015; 10:1691-701. [PMID: 25784799 PMCID: PMC4356664 DOI: 10.2147/ijn.s76755] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In this study, mesoporous silica nanoparticles (MSNs) were used to prepare an oral push–pull osmotic pump. Fenofibrate, the selected model drug, was firstly loaded into the MSNs, followed by a suspending agent consisting of a drug layer of push–pull osmotic pump. Fenofibrate-loaded MSNs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption/desorption analysis, differential scanning calorimetry (DSC), powder X-ray diffractometry (PXRD) analysis, and Fourier-transform infrared (FT-IR) spectroscopy. Polyethylene oxide of molecular weight (MW) 100,000 and polyethylene oxide of MW 6,000,000 were selected as the suspending agent and the expanding agent, respectively. Cellulose acetate was used as the semipermeable membrane, along with polyethylene glycol 6,000 to increase the flexibility and control the membrane permeability. The in vitro dissolution studies indicated that the osmotic pump tablet combined with MSNs was able to deliver fenofibrate in an approximately zero-order manner in 24 hours. A pharmacokinetic study showed that, although the maximum plasma concentration of the osmotic pump was lower than that of the reference formulation, the relative bioavailability was increased, indicating that the osmotic pump was more efficient than the reference tablets. Therefore, using MSNs as a carrier for poorly water-soluble drugs is an effective method for preparing osmotic pump tablets.
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Affiliation(s)
- Zongzhe Zhao
- Pharmacy School, Liaoning Medical University, Jinzhou, Liaoning Province, People's Republic of China
| | - Chao Wu
- Pharmacy School, Liaoning Medical University, Jinzhou, Liaoning Province, People's Republic of China
| | - Ying Zhao
- Pharmacy School, Liaoning Medical University, Jinzhou, Liaoning Province, People's Republic of China
| | - Yanna Hao
- Pharmacy School, Liaoning Medical University, Jinzhou, Liaoning Province, People's Republic of China
| | - Ying Liu
- Pharmacy School, Liaoning Medical University, Jinzhou, Liaoning Province, People's Republic of China
| | - Wenming Zhao
- Pharmacy School, Liaoning Medical University, Jinzhou, Liaoning Province, People's Republic of China
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Alam N, Beg S, Rizwan M, Ahmad A, Ahmad FJ, Ali A, Aqil M. Mucoadhesive elementary osmotic pump tablets of trimetazidine for controlled drug delivery and reduced variability in oral bioavailability. Drug Dev Ind Pharm 2014; 41:692-702. [PMID: 24669975 DOI: 10.3109/03639045.2014.900076] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The objectives of this work was preparation and evaluation of the mucoadhesive elementary osmotic pump tablets of trimetazidine hydrochloride to achieve desired controlled release action and augmentation of oral drug absorption. The drug-loaded core tablets were prepared employing the suitable tableting excipients and coated with polymeric blend of ethyl cellulose and hydroxypropyl methylethylcellulose E5 (4:1). The prepared tablets were characterized for various quality control tests and in vitro drug release. Evaluation of drug release kinetics through model fitting suggested the Fickian mechanism of drug release, which was regulated by osmosis and diffusion as the predominant mechanism. Evaluation of mucoadhesion property using texture analyzer suggested good mucoadhesion potential of the developed osmotic systems. Solid state characterization using Fourier-transform infrared spectroscopy, differential scanning calorimetry and powder X-ray diffraction spectroscopy confirmed the absence of any physiochemical incompatibilities between drug and excipients. Scanning electron microscopy analysis showed the smooth surface appearance of the coated tablets with intact polymeric membrane without any fracture. In vivo pharmacokinetic studies in rabbits revealed 3.01-fold enhancement in the oral bioavailability vis-à-vis the marketed formulation (Vastarel MR®). These studies successfully demonstrate the bioavailability enhancement potential of the mucoadhesive elementary osmotic pumps as novel therapeutic systems for other drugs too.
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Affiliation(s)
- Naushad Alam
- Department of Pharmaceutics, Hamdard University , New Delhi , India
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Aiba M, Tokuyama T, Baba S, Matsumoto H, Tomioka H, Higashihara T, Ueda M. Improvement in semipermeable membrane performance of wholly aromatic polyamide through an additive processing strategy. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Motohiro Aiba
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
| | | | - Susumu Baba
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
| | - Hidetoshi Matsumoto
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
| | | | - Tomoya Higashihara
- Department of Polymer Science and Engineering, Faculty of EngineeringYamagata University4‐3‐16 JonanYonezawa City Yamagata992‐8510 Japan
| | - Mitsuru Ueda
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
- Department of Polymer Science and Engineering, Faculty of EngineeringYamagata University4‐3‐16 JonanYonezawa City Yamagata992‐8510 Japan
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Hill A, Geißler S, Meyring M, Hecht S, Weigandt M, Mäder K. In vitro–in vivo evaluation of nanosuspension release from subcutaneously implantable osmotic pumps. Int J Pharm 2013; 451:57-66. [DOI: 10.1016/j.ijpharm.2013.04.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 04/13/2013] [Accepted: 04/16/2013] [Indexed: 11/26/2022]
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10
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Controlled delivery of nanosuspensions from osmotic pumps: Zero order and non-zero order kinetics. J Control Release 2012; 158:403-12. [DOI: 10.1016/j.jconrel.2011.12.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 12/06/2011] [Accepted: 12/07/2011] [Indexed: 11/30/2022]
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11
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Andjelić S, Yuan J, Jamiolkowski DD, Diluccio R, Bezwada R, Zhang H, Mijović J. Hydrophilic Absorbable Copolyester Exhibiting Zero-Order Drug Release. Pharm Res 2006; 23:821-34. [PMID: 16463009 DOI: 10.1007/s11095-006-9664-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2005] [Accepted: 12/06/2005] [Indexed: 10/25/2022]
Abstract
PURPOSE A novel absorbable hydrophilic copolyester developed in our laboratory, amorphous 40/60 poly(ethylene diglycolate-co-glycolide), exhibits outstanding physical properties. Films made from this material appear fully transparent, colorless, soft and slightly elastic, but relatively strong and durable materials so that they can be potentially used as stand-alone devices in various in-vivo medical applications. In this study, in-vitro drug release characteristics of this copolyester were examined. METHODS High Performance Liquid Chromatography was used to generate release profiles on selected non-steroidal anti-inflammatory agents, NSAIDs. In addition, dielectric relaxation spectroscopy, as well as mid- and near infrared spectroscopy, were used to study specific polymer chain interactions in water and buffer solution as a function of aging time at 37 degrees C. RESULTS This copolyester, compression molded into a film, exhibited nearly constant in-vitro release of various hydrophilic and hydrophobic drugs. The release profile showed minimal or, in most cases, no burst effect. The effect was observed with the three NSAIDs that were tested as model compounds; however, this system may prove generally useful for other drug entities. In-vitro hydrolysis conducted at 37 degrees C on this hydrophilic copolyester revealed an unusually long induction period (no hydrolysis for up to 6 days), followed by the relatively rapid hydrolysis. Data from dipole relaxation spectroscopy indicated that the water molecules do not structurally associate with the polymer chains in phosphate buffer during initial hydrolysis period. CONCLUSIONS The results suggest unique dynamics of water diffusion through the polymer matrix that may play a critical role in achieving controlled release properties. Furthermore, we suspect that the molecular interactions associated with this new synthetic absorbable material may find a critical utility in important medical applications.
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Affiliation(s)
- Sasa Andjelić
- Procedural Implants R&D, Ethicon, a Johnson & Johnson Company, Route 22 West, Somerville, New Jersey 08876-0151, USA.
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13
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Abstract
Because interdental and subgingival sites are relatively inaccessible to mouthrinsing, they necessitate alternative methods of application of anti-plaque chemicals. These include routine oral hygiene aids, surfactants to enhance uptake and retention of antimicrobials, gels and periodontal dressings. The principal modes of application that have received attention recently, apart from the systemic route, are syringe and pulsated jet irrigation and slow release compounds. Slow release devices currently receiving attention may be classified as membrane diffusion, solution of drug in polymer and solid drug dispersed in polymer matrix. The most widespread dental instance of a slow release device appears to be the use of varnishes and resins to carry fluoride. Recent attempts at devising improved methods of antimicrobial application include the testing of materials for their biodegradability or for their potential to adhere to mucosal surfaces. It is concluded that the potential exists for antimicrobials applied directly to the site of intended action to contribute significantly to dental health, particularly when employed as components of practical oral hygiene regimes.
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Bindschaedler C, Gurny R, Doelker E. Osmotically controlled drug delivery systems produced from organic solutions and aqueous dispersions of cellulose acetate. J Control Release 1986. [DOI: 10.1016/0168-3659(86)90004-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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16
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Davis SS, Hardy JG, Taylor MJ, Stockwell A, Whalley DR, Wilson CG. The in-vivo evaluation of an osmotic device (Osmet) using gamma scintigraphy. J Pharm Pharmacol 1984; 36:740-2. [PMID: 6150976 DOI: 10.1111/j.2042-7158.1984.tb04862.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The release of a radiolabelled marker from an orally administered osmotic pump device (Osmet) has been evaluated in-vivo in a group of 6 subjects, using the technique of gamma scintigraphy. The duration of residence of the pump in the stomach was greatly influenced by food intake. However, the release of the marker from the device was independent of food and position within the gastrointestinal tract. Furthermore, the material released from the osmotic pump was well distributed in the gastrointestinal tract. Good agreement between in-vitro and in-vivo release rates was obtained.
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Davis S, Hardy J, Taylor M, Whalley D, Wilson C. The effect of food on the gastrointestinal transit of pellets and an osmotic device (Osmet). Int J Pharm 1984. [DOI: 10.1016/0378-5173(84)90191-1] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Nau H, Finley P, Williams J, Brendel K. Valproic acid pharmacokinetics in the mouse following controlled-release of pharmacologic and toxic doses via novel implantable and refillable drug reservoirs. Biopharm Drug Dispos 1983; 4:173-82. [PMID: 6411139 DOI: 10.1002/bdd.2510040209] [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: 01/20/2023]
Abstract
Novel drug reservoirs are described which, after their implantation under mouse skin, continuously released organic liquids such as the anti-epileptic drug valproic acid at preselected rates for periods up to several weeks. The liquids, which were filled into the reservoirs, diffused through silastic membranes. The area and thickness of these membranes determined the administered dose. Administration of the anti-epileptic drug valproic acid at various selected doses resulted in persistent drug concentrations spanning from subtherapeutic to toxic levels. The drug reservoirs were easily refillable in situ which greatly extended the duration of the experiment. The dose administered could be determined within 5-15 per cent (rel. S.D.). It is suggested that the maintenance of persistent drug levels in small laboratory animals may be an appropriate model for the pharmacological and toxicological study of those compounds with short half-lives and high clearance rates in these species.
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Nau H, Zierer R, Spielmann H, Neubert D, Gansau C. A new model for embryotoxicity testing: teratogenicity and pharmacokinetics of valproic acid following constant-rate administration in the mouse using human therapeutic drug and metabolite concentrations. Life Sci 1981; 29:2803-14. [PMID: 6799722 DOI: 10.1016/0024-3205(81)90541-5] [Citation(s) in RCA: 141] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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