1
|
Gontijo AVL, Cavalieri AVG. Individualized optimization of colistin loading doses. J Pharmacokinet Pharmacodyn 2023; 50:11-20. [PMID: 36323974 DOI: 10.1007/s10928-022-09831-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
Abstract
Colistin remains one of the few available options for the treatment of infections caused by resistant bacteria. Pharmacokinetic (PK) studies have been successful in estimating the appropriate colistin methanesulfonate (CMS) dose to achieve a target colistin concentration. Currently, there is a consensus that the dose of CMS should vary according to the patient renal function since CMS is mainly eliminated by renal route. For this same reason, the loading dose should vary according to the patient's renal capacity; however, this is not the current clinical practice. In this study we develop a framework to determine two key parameters for the loading dose regimen: (1) the optimal dose according to the characteristics (renal function and weight) of the patient; (2) the waiting time before the maintenance dose. Based on a previous PK model, our framework allows a fast parameter sweep so as to select optimal loading dose and waiting time minimizing the deviation between the plasma concentration and a target value. The results showed that patients presenting low creatinine clearance (CrCL) should receive a lower CMS loading dose with longer interval to start maintenance treatment to avoid nephrotoxic colistin concentrations. In cases of high CrCL, the dose should be higher and the interval to the next dose shorter to avoid subtherapeutic concentrations. Optimization of the loading dose should considerably improve colistin therapy, as the target concentration is reached more quickly, without reaching toxic values.
Collapse
Affiliation(s)
- Aline Vidal Lacerda Gontijo
- Department of Pharmacy, Anhanguera University, Av. Dr. João Batista de Souza Soares, 4009 - Cidade Morumbi, São José dos Campos, SP, 12236-660, Brazil.
| | - André V G Cavalieri
- Divisão de Engenharia Aeroespacial, Instituto Tecnológico de Aeronáutica, São José dos Campos, SP, Brazil
| |
Collapse
|
2
|
Gontijo AVL, Pereira SL, de Lacerda Bonfante H. Can Drug Repurposing be Effective Against Carbapenem-Resistant Acinetobacter baumannii? Curr Microbiol 2021; 79:13. [PMID: 34905109 PMCID: PMC8669236 DOI: 10.1007/s00284-021-02693-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 09/09/2021] [Indexed: 11/25/2022]
Abstract
Carbapenem-resistant Acinetobacter baumannii has been classified as a top priority for the development of new therapies due to its resistance to most antibiotics. Drug repurposing may be a fast and inexpensive strategy for treating this pathogen. This review aims to critically evaluate repurposed drugs for the treatment of infections caused by carbapenem-resistant A. baumannii, correlating their antimicrobial activity with data available for toxicity and side effects. Some drugs have been suggested as promising candidates for repurposing; however, in some cases, high toxicity and low plasma concentrations reduce applicability in clinical practice. The most favorable applicability is offered by fusidic acid and colistin, possibly combined with a third agent, promising to be well tolerated and achieving satisfactory plasma concentrations.
Collapse
Affiliation(s)
- Aline Vidal Lacerda Gontijo
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Juiz de Fora (UFJF), Rua José Lourenço Kelmer, s/n, São Pedro, Juiz de Fora, Minas Gerais, 36036-900, Brazil.
| | - Sharlene Lopes Pereira
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Juiz de Fora (UFJF), Rua José Lourenço Kelmer, s/n, São Pedro, Juiz de Fora, Minas Gerais, 36036-900, Brazil
| | - Herval de Lacerda Bonfante
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Juiz de Fora (UFJF), Rua José Lourenço Kelmer, s/n, São Pedro, Juiz de Fora, Minas Gerais, 36036-900, Brazil
- Division of Rheumatology, Hospital Santa Casa de Misericórdia de Juiz de Fora (SCMJF), Juiz de Fora, Minas Gerais, Brazil
- Department of Internal Medicine, School of Medical Sciences, Health of Juiz de Fora (SUPREMA), Juiz de Fora, Minas Gerais, Brazil
| |
Collapse
|
3
|
Abstract
Optimization of antibiotic administration helps minimizing cases of bacterial resistance. Dosages are often selected by trial and error using a pharmacokinetic (PK) model. However, this is limited to the range of tested dosages, restraining possible treatment choices, especially for the loading doses. Colistin is a last-resort antibiotic with a narrow therapeutic window; therefore, its administration should avoid subtherapeutic or toxic concentrations. This study formulates an optimal control problem for dosage selection of colistin based on a PK model, minimizing deviations of colistin concentration to a target value and allowing a specific dosage optimization for a given individual. An adjoint model was used to provide the sensitivity of concentration deviations to dose changes. A three-compartment PK model was adopted. The standard deviation between colistin plasma concentrations and a target set at 2 mg/L was minimized for some chosen treatments and sample patients. Significantly lower deviations from the target concentration are obtained for shorter administration intervals (e.g. every 8 h) compared to longer ones (e.g. every 24 h). For patients with normal or altered renal function, the optimal loading dose regimen should be divided into two or more administrations to attain the target concentration quickly, with a high first loading dose followed by much lower ones. This regimen is not easily obtained by trial and error, highlighting advantages of the method. The present method is a refined optimization of antibiotic dosage for the treatment of infections. Results for colistin suggest significant improvement in treatment avoiding subtherapeutic or toxic concentrations.
Collapse
Affiliation(s)
- Aline Vidal Lacerda Gontijo
- Department of Clinical and Toxicological Analysis, Federal University of Alfenas, Rua Gabriel Monteiro da Silva 700, Centro, Alfenas, MG, 37130-001, Brazil.
- Department of Pharmacy, Anhanguera Educacional, São José dos Campos, SP, Brazil.
| | - André V G Cavalieri
- Divisão de Engenharia Aeroespacial, Instituto Tecnológico de Aeronáutica, São José dos Campos, SP, Brazil
| |
Collapse
|
4
|
Sampaio ADG, Gontijo AVL, Lima GDMG, de Oliveira MAC, Lepesqueur LSS, Koga-Ito CY. Ellagic Acid-Cyclodextrin Complexes for the Treatment of Oral Candidiasis. Molecules 2021; 26:molecules26020505. [PMID: 33477918 PMCID: PMC7833435 DOI: 10.3390/molecules26020505] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 12/14/2022] Open
Abstract
The increase in the prevalence of fungal infections worldwide and the rise in the occurrence of antifungal resistance suggest that new research to discover antifungal molecules is needed. The aim of this study was to evaluate the potential use of ellagic acid–cyclodextrin complexes (EA/HP-β-CD) for the treatment of oral candidiasis. First, the effect of EA/HP-β-CD on C. albicans planktonic cells and biofilms was evaluated. Then, the cytotoxicity of the effective concentration was studied to ensure safety of in vivo testing. Finally, the in vivo effectiveness was determined by using a murine model of induced oral candidiasis. Data was statistically analyzed. The minimal inhibitory concentration of EA/HP-β-CD was 25 µg/mL and a concentration of 10 times MIC (250 µg/mL) showed an inhibitory effect on C. albicans 48 h-biofilms. The complex at concentration 250 µg/mL was classified as slightly cytotoxic. In vivo experiments showed a reduction in fungal epithelial invasion after treatment with EA/HP-β-CD for 24 h and 96 h when compared to the negative control. In conclusion, the results demonstrated that EA/HP-β-CD has antifungal and anti-inflammatory effects, reducing the invasive capacity of C. albicans, which suggests that EA/HP-β-CD may be a promising alternative for the treatment of oral candidiasis.
Collapse
Affiliation(s)
- Aline da Graça Sampaio
- Oral Biopathology Graduate Program, São José dos Campos Institute of Science & Technology, São Paulo State University, UNESP, São Paulo 12245-000, Brazil; (A.d.G.S.); (A.V.L.G.); (G.d.M.G.L.); (M.A.C.d.O.); (L.S.S.L.)
| | - Aline Vidal Lacerda Gontijo
- Oral Biopathology Graduate Program, São José dos Campos Institute of Science & Technology, São Paulo State University, UNESP, São Paulo 12245-000, Brazil; (A.d.G.S.); (A.V.L.G.); (G.d.M.G.L.); (M.A.C.d.O.); (L.S.S.L.)
| | - Gabriela de Morais Gouvêa Lima
- Oral Biopathology Graduate Program, São José dos Campos Institute of Science & Technology, São Paulo State University, UNESP, São Paulo 12245-000, Brazil; (A.d.G.S.); (A.V.L.G.); (G.d.M.G.L.); (M.A.C.d.O.); (L.S.S.L.)
| | - Maria Alcionéia Carvalho de Oliveira
- Oral Biopathology Graduate Program, São José dos Campos Institute of Science & Technology, São Paulo State University, UNESP, São Paulo 12245-000, Brazil; (A.d.G.S.); (A.V.L.G.); (G.d.M.G.L.); (M.A.C.d.O.); (L.S.S.L.)
| | - Laura Soares Souto Lepesqueur
- Oral Biopathology Graduate Program, São José dos Campos Institute of Science & Technology, São Paulo State University, UNESP, São Paulo 12245-000, Brazil; (A.d.G.S.); (A.V.L.G.); (G.d.M.G.L.); (M.A.C.d.O.); (L.S.S.L.)
- School of Dentistry, Santo Amaro University, São Paulo 04743-030, Brazil
| | - Cristiane Yumi Koga-Ito
- Oral Biopathology Graduate Program, São José dos Campos Institute of Science & Technology, São Paulo State University, UNESP, São Paulo 12245-000, Brazil; (A.d.G.S.); (A.V.L.G.); (G.d.M.G.L.); (M.A.C.d.O.); (L.S.S.L.)
- Department of Environment Engineering, São José dos Campos Institute of Science & Technology, São Paulo State University, UNESP, São Paulo 12247-016, Brazil
- Correspondence: ; Tel.: +55-12-39479708
| |
Collapse
|
5
|
Borges AC, Lima GDMG, Nishime TMC, Gontijo AVL, Kostov KG, Koga-Ito CY. Amplitude-modulated cold atmospheric pressure plasma jet for treatment of oral candidiasis: In vivo study. PLoS One 2018; 13:e0199832. [PMID: 29949638 PMCID: PMC6021106 DOI: 10.1371/journal.pone.0199832] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 06/14/2018] [Indexed: 01/14/2023] Open
Abstract
The aim of this study was to establish an effective and safe protocol for in vivo oral candidiasis treatment with atmospheric plasma jets. A novel amplitude-modulated cold atmospheric pressure plasma jet (AM-CAPPJ) device, operating with Helium, was tested. In vitro assays with Candida albicans biofilms and Vero cells were performed in order to determine the effective parameters with low cytotoxicity. After the determination of such parameters, the protocol was evaluated in experimentally induced oral candidiasis in mice. AM-CAPPJ could significantly reduce the viability of C. albicans biofilms after 5 minutes of plasma exposure when compared to the non-exposed group (p = 0.0033). After this period of exposure, high viability of Vero cells was maintained (86.33 ± 10.45%). Also, no late effects on these cells were observed after 24 and 48 hours (83.24±15.23% and 88.96±18.65%, respectively). Histological analyses revealed significantly lower occurrence of inflammatory alterations in the AM-CAPPJ group when compared to non-treated and nystatin-treated groups (p < 0.0001). Although no significant differences among the values of CFU/tongue were observed among the non-treated group and the groups treated with AM-CAPPJ or nystatin (p = 0.3201), histological analyses revealed marked reduction in candidal tissue invasion. In conclusion, these results point out to a clinical applicability of this protocol, due to the simultaneous anti-inflammatory and inhibitory effects of AM-CAPPJ with low cytotoxicity.
Collapse
Affiliation(s)
- Aline Chiodi Borges
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Gabriela de Morais Gouvêa Lima
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | | | - Aline Vidal Lacerda Gontijo
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Konstantin Georgiev Kostov
- Department of Chemistry and Physics, Guaratinguetá Faculty of Engineering, São Paulo State University (UNESP), Guaratinguetá, Brazil
| | - Cristiane Yumi Koga-Ito
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
- * E-mail:
| |
Collapse
|
6
|
Albuquerque YE, Danelon M, Salvador MJ, Koga-Ito CY, Botazzo Delbem AC, Ramirez-Rueda RY, Lacerda Gontijo AV, Brighenti FL. Mouthwash containing Croton doctoris essential oil: in vitro study using a validated model of caries induction. Future Microbiol 2018; 13:631-643. [DOI: 10.2217/fmb-2017-0209] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Aim: To validate an in vitro caries model and to evaluate an experimental mouthwash containing Croton doctoris essential oil. Materials & methods: To validate the experimental model, we used McBain medium and polymicrobial biofilms. The EOM (essential oil mouthwash) was tested using the validated model. Microbial composition (colony-forming unit/ml), acidogenicity, enamel demineralization (percentage of surface enamel hardness loss), cytotoxicity and essential oil composition were evaluated. Results: The model was validated with 0.5% sucrose, duration of 4 days and treatments twice per day. There were statistically significant differences between the EOM, the negative control and chlorhexidine mouthwash in colony-forming unit/ml and percentage of surface enamel hardness loss. Cytotoxicity was similar to that of chlorhexidine mouthwash. A total of 66.11% of the essential oil consists of sesquiterpenes. Conclusion: The experimental mouthwash showed antimicrobial activity against polymicrobial biofilms and reduced enamel demineralization.
Collapse
Affiliation(s)
- Yasmin Etienne Albuquerque
- Faculdade de Odontologia, Universidade Estadual Paulista (UNESP), Campus de Araraquara. R Humaitá, 1680, Araraquara – SP 14801-903, Brazil
| | - Marcelle Danelon
- Faculdade de Odontologia, Universidade Estadual Paulista (UNESP), Campus de Araçatuba. R José Bonifácio, 1193, Araçatuba – SP 16015-050, Brazil
| | - Marcos José Salvador
- Department of Plant Biology, PPG BTPB and PPG BV, Institute of Biology, University of Campinas - UNICAMP, Postal box 6109, Campinas – SP 13083-970, Brazil
| | - Cristiane Yumi Koga-Ito
- Instituto de Ciência e Tecnologia, Universidade Estadual Paulista (UNESP), Campus de São José dos Campos Av Eng Francisco José Longo, 777, São José dos Campos – SP 12245-000, Brazil
| | - Alberto Carlos Botazzo Delbem
- Faculdade de Odontologia, Universidade Estadual Paulista (UNESP), Campus de Araçatuba. R José Bonifácio, 1193, Araçatuba – SP 16015-050, Brazil
| | - Román Yesid Ramirez-Rueda
- Department of Plant Biology, PPG BTPB and PPG BV, Institute of Biology, University of Campinas - UNICAMP, Postal box 6109, Campinas – SP 13083-970, Brazil
| | - Aline Vidal Lacerda Gontijo
- Department of Plant Biology, PPG BTPB and PPG BV, Institute of Biology, University of Campinas - UNICAMP, Postal box 6109, Campinas – SP 13083-970, Brazil
| | - Fernanda Lourenção Brighenti
- Faculdade de Odontologia, Universidade Estadual Paulista (UNESP), Campus de Araraquara. R Humaitá, 1680, Araraquara – SP 14801-903, Brazil
| |
Collapse
|
7
|
Oliveira MACD, Borges AC, Brighenti FL, Salvador MJ, Gontijo AVL, Koga-Ito CY. Cymbopogon citratus essential oil: effect on polymicrobial caries-related biofilm with low cytotoxicity. Braz Oral Res 2017; 31:e89. [PMID: 29116300 DOI: 10.1590/1807-3107bor-2017.vol31.0089] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 08/08/2017] [Indexed: 11/21/2022] Open
Abstract
The objective of this study was to evaluate the effects of Cymbopogon citratus essential oil and its main compound (citral) against primary dental colonizers and caries-related species. Chemical characterization of the essential oil was performed by gas chromatography/mass spectroscopy (GC/MS), and the main compound was determined. Antimicrobial activity was tested against Actinomyces naeslundii, Lactobacillus acidophilus, S. gordonii, S. mitis, S. mutans, S. sanguinis and S. sobrinus. Minimum inhibitory and bactericide concentrations were determined by broth microdilution assay for streptococci and lactobacilli reference, and for clinical strains. The effect of the essential oil on bacterial adhesion and biofilm formation/disruption was investigated. Negative (without treatment) and positive controls (chlorhexidine) were used. The effect of citral on preformed biofilm was also tested using the same methodology. Monospecies and microcosm biofilms were tested. ANOVA or Kruskal-Wallis tests were used (α=0.05). Cytotoxicity of the essential oil to human keratinocytes was performed by MTT assay. GC/MS demonstrated one major component (citral). The essential oil showed an inhibitory effect on all tested bacterial species, including S. mutans and L. acidophilus. Essential oil of C. citratus (10X MIC) reduced the number of viable cells of lactobacilli and streptococci biofilms (p < 0.05). The essential oil inhibited adhesion of caries-related polymicrobial biofilm to dental enamel (p < 0.01). Citral significantly reduced the number of viable cells of streptococci biofilm (p < 0.001). The essential oil showed low cytotoxicity to human keratinocytes. Based on these findings, this study can contribute to the development of new formulations for products like mouthwash, against dental biofilms.
Collapse
Affiliation(s)
- Maria Alcionéia Carvalho de Oliveira
- Universidade Estadual Paulista - Unesp, São José dos Campos Institute of Science and Technology, Oral Biopathology Graduate Program, São José dos Campos , SP, Brazil
| | - Aline Chiodi Borges
- Universidade Estadual Paulista - Unesp, São José dos Campos Institute of Science and Technology, Department of Environmental Engineering, São José dos Campos , SP, Brazil
| | - Fernanda Lourenção Brighenti
- Universidade Estadual Paulista - Unesp, Department of Orthodontics and Pediatric Dentistry, Araraquara, SP, Brazil
| | - Marcos José Salvador
- Universidade Estadual de Campinas - Unicamp, Institute of Biology, Department of Plant Biology, Campinas, SP, Brazil
| | - Aline Vidal Lacerda Gontijo
- Universidade Estadual de Campinas - Unicamp, Institute of Biology, Department of Plant Biology, Campinas, SP, Brazil
| | - Cristiane Yumi Koga-Ito
- Universidade Estadual Paulista - Unesp, São José dos Campos Institute of Science and Technology, Department of Environmental Engineering, São José dos Campos , SP, Brazil
| |
Collapse
|
8
|
Brighenti FL, Salvador MJ, Gontijo AVL, Delbem ACB, Delbem ÁCB, Soares CP, de Oliveira MAC, Girondi CM, Koga-Ito CY. Plant extracts: initial screening, identification of bioactive compounds and effect against Candida albicans biofilms. Future Microbiol 2016; 12:15-27. [PMID: 27922746 DOI: 10.2217/fmb-2016-0094] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
AIM This study screened plants from Brazilian Pantanal for Candida albicans antibiofilm activity. MATERIAL & METHODS Sixty extracts were obtained from ten plants using different extraction methods. Antifungal activity was assessed. Effects on biofilm inhibition and disruption and cytotoxicity were also evaluated. The most active extract was chemically characterized. RESULTS Buchenavia tomentosa ethanolic extract showed noticeable antifungal activity and was selected for biofilm experiments. Subinhibitory concentration of extract inhibited fungal adhesion. Maximum killing reached 90% of C. albicans cells in suspension and 65% of cells in biofilms. The active extract was noncytotoxic. Chemical characterization showed the presence of phenols. Ellagic and gallic acids showed activity on C. albicans. CONCLUSION B. tomentosa extract and its isolated compound, ellagic acid, presented antibiofilm activity and low toxicity.
Collapse
Affiliation(s)
- Fernanda Lourenção Brighenti
- Faculty of Dentistry, Univ. Estadual Paulista/UNESP, Araraquara, R. Humaitá, 1680, Araraquara, SP 14801-903, Brazil
| | - Marcos José Salvador
- Institute of Biology, University of Campinas/UNICAMP, Postal Box 6109, Campinas, SP 3083-970, Brazil
| | | | - Alberto Carlos Botazzo Delbem
- Faculty of Dentistry, Univ. Estadual Paulista/UNESP, Araçatuba, R. José Bonifácio, 1193, Araçatuba, SP 16015-050, Brazil
| | - Ádina Cléia Botazzo Delbem
- Faculty of Dentistry, Univ. Estadual Paulista/UNESP, Araçatuba, R. José Bonifácio, 1193, Araçatuba, SP 16015-050, Brazil
| | - Cristina Pacheco Soares
- Universidade do Vale do Paraíba - UNIVAP, Av. Shishima Hifumi, 2911, São José dos Campos, SP 12244-390, Brazil
| | - Maria Alcionéiac Carvalho de Oliveira
- Institute of Science & Technology, Univ. Estadual Paulista/UNESP, São José dos Campos, Av. Eng. Francisco José Longo, 777, São José dos Campos, SP 12245-000, Brazil
| | - Camila Miorelli Girondi
- Institute of Science & Technology, Univ. Estadual Paulista/UNESP, São José dos Campos, Av. Eng. Francisco José Longo, 777, São José dos Campos, SP 12245-000, Brazil
| | - Cristiane Yumi Koga-Ito
- Institute of Science & Technology, Univ. Estadual Paulista/UNESP, São José dos Campos, Av. Eng. Francisco José Longo, 777, São José dos Campos, SP 12245-000, Brazil
| |
Collapse
|
9
|
Rios Valentim SJ, Gontijo AVL, Peres MD, de Melo Rodrigues LC, Nakamura-Palacios EM. D1 dopamine and NMDA receptors interactions in the medial prefrontal cortex: Modulation of spatial working memory in rats. Behav Brain Res 2009; 204:124-8. [DOI: 10.1016/j.bbr.2009.05.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2009] [Revised: 05/20/2009] [Accepted: 05/23/2009] [Indexed: 11/29/2022]
|