1
|
Yadav H, Pandit D, Singh S, Sharma P, Garg K, Girdhar N, Sharma K, Chopra V, Chopra S, Sharma S. GST polymorphism as a predictive biomarker for modulating the susceptibility to chronic obstructive pulmonary disease: A North Indian study. Exp Physiol 2024; 109:302-311. [PMID: 37948104 PMCID: PMC10988663 DOI: 10.1113/ep091339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 10/27/2023] [Indexed: 11/12/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is commonly characterized by shortness of breath, coughing or expectoration. Smoking is the leading cause of COPD development, but only a small percentage of smokers develop symptoms, implying a genetic component. Glutathione S-transferase enzymes are responsible for detoxifying cigarette smoke components. The role of glutathione S-transferase T1 (GSTT1) and glutathione S-transferase M1 (GSTM1) gene polymorphism was assessed with COPD susceptibility and associated clinical parameters in the North Indian population. This was a cross-sectional study involving 200 COPD patients and 200 healthy individuals, with peripheral blood sampling and adequate questionnaires. Multiplex PCR was used for genotyping GSTT1 and GSTM1 gene polymorphism. Logistic regression was used to calculate the odds ratio and 95% confidence intervals to assess the COPD risk and GST polymorphisms. The GSTT1 gene deletion rate was higher in COPD cases (34.5%) than in healthy individuals (20.5%). A statistical relationship between the GSTT1(-) null genotype and COPD risk was observed (odds ratio = 2.04, 95% CI = 1.30-3.20, P = 0.0019). After adjusting for covariates like age, sex and smoking status, a significant association was found for GSTT1(-) null genotype and COPD risk (adjusted odds ratio = 2.90, 95% CI = 1.43-5.87, P = 0.003). The GSTT1(-) genotype was also significantly correlated with clinical parameters for COPD risk. Another primary observation was that females with the GSTT1(-) null genotype were more vulnerable to COPD than males with the same gene deletion. The GSTT1(-) null genotype strongly correlates with COPD development, while no association was observed in the GSTM1(-) null genotype in the North Indian population.
Collapse
Affiliation(s)
- Harsh Yadav
- Department of Pulmonary Medicine Government Medical CollegeTB & Chest Diseases HospitalPatialaPunjabIndia
| | - Depanshi Pandit
- Department of BiotechnologyThapar Institute of Engineering and TechnologyPatialaPunjabIndia
| | - Sidhartha Singh
- Department of BiotechnologyThapar Institute of Engineering and TechnologyPatialaPunjabIndia
| | - Parul Sharma
- Department of BiotechnologyThapar Institute of Engineering and TechnologyPatialaPunjabIndia
| | - Kranti Garg
- Department of Pulmonary Medicine Government Medical CollegeTB & Chest Diseases HospitalPatialaPunjabIndia
| | - Nidhi Girdhar
- Department of Pulmonary Medicine Government Medical CollegeTB & Chest Diseases HospitalPatialaPunjabIndia
| | - Karan Sharma
- Department of Pulmonary Medicine Government Medical CollegeTB & Chest Diseases HospitalPatialaPunjabIndia
| | - Vishal Chopra
- Department of Pulmonary Medicine Government Medical CollegeTB & Chest Diseases HospitalPatialaPunjabIndia
| | - Siddharth Chopra
- Department of Internal MedicineSt. Joseph Mercy Oakland HospitalPontiacMichiganUSA
| | - Siddharth Sharma
- Department of BiotechnologyThapar Institute of Engineering and TechnologyPatialaPunjabIndia
| |
Collapse
|
2
|
Quintana-Sosa M, León-Mejía G, Narváez DM, Suarez-Arnedo A, Restrepo HGD, De Moya YS, Ruiz-Benitez M, Valencia KF, Trindade C, Miranda-Guevara A, Dias J, Henriques JAP, da Silva J. Association of buccal micronucleus cytome assay (BMNCyt) biomarkers with inorganic element concentration and genetic polymorphisms in welders. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 97:104025. [PMID: 36460284 DOI: 10.1016/j.etap.2022.104025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Welding fumes are classified as carcinogenic to humans. The aim of the present study was to measure buccal micronucleus cytome assay biomarkers and to evaluate their association with inorganic elements and genetic polymorphisms (XRCC1, OGG1, XRCC3, GSTM1, and GSTT1) in welders (n = 98) and control individuals (n = 100). Higher levels of DNA damage and cell death were observed in the exposed group. Also, a significant correlation between the frequency of micronuclei and Na, Si, Cl, Ti, Cr, Zn and Mg concentrations. The formation of micronuclei, binucleated cells, cell death was associated with polymorphisms in repair pathways. The OGG1Ser326Cys and XRCC3 241Thr/Met genotypes were associated with cell death. Individuals with GSTM1 null genotype had a higher frequency of micronuclei. These results demonstrate that the deleterious effects of exposure to welding fumes are exacerbated by lifestyle habits, and genetic polymorphisms can influence DNA damage and cell death.
Collapse
Affiliation(s)
- Milton Quintana-Sosa
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Grethel León-Mejía
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia.
| | - Diana M Narváez
- Laboratorio de Genética Humana, Universidad de los Andes, Bogotá, Colombia
| | | | | | - Yurina Sh De Moya
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Martha Ruiz-Benitez
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Karen Franco Valencia
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Cristiano Trindade
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Alvaro Miranda-Guevara
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Johnny Dias
- Laboratório de Implantação Iônica, Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - João Antonio Pêgas Henriques
- Programa de Pós-graduação em Biotecnologia, Universidade do Vale do Taquari - UNIVATES, Lajeado, RS, Brazil; Departamento de Biofísica, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Juliana da Silva
- Laboratório de Genética Toxicológica, Universidade Luterana do Brasil (ULBRA) & Universidade La Salle (UniLaSalle), Canoas, RS, Brazil.
| |
Collapse
|
3
|
Nakanishi G, Pita-Oliveira M, Bertagnolli LS, Torres-Loureiro S, Scudeler MM, Cirino HS, Chaves ML, Miwa B, Rodrigues-Soares F. Worldwide Systematic Review of GSTM1 and GSTT1 Null Genotypes by Continent, Ethnicity, and Therapeutic Area. OMICS : A JOURNAL OF INTEGRATIVE BIOLOGY 2022; 26:528-541. [PMID: 36112350 DOI: 10.1089/omi.2022.0090] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Glutathione S-transferase Mu 1 (GSTM1) and glutathione S-transferase theta 1 (GSTT1) enzymes are glutathione-S-transferases with broad significance for susceptibility or resistance to multifactorial human diseases, as well as detoxification of environmental chemicals and drugs. Moreover, some individuals may have a complete deletion of GSTM1 and GSTT1 genes, which can contribute to patient-to-patient variability in drug safety and efficacy. GSTM1 and GSTT1 gene deletion frequencies can vary according to ethnicity and continental origin of the studied population with implications for achieving the goal of precision/personalized medicine in clinical practice. We report here a worldwide systematic review of the null genotypes in these two clinically important genes by continents, ethnicities, and therapeutic areas (TAs). Searches were performed in the PubMed database covering the period from 1992 to 2020. Out of the 1925 articles included, most studies analyzed European individuals, corroborating the literature failure for not adequately considering the non-European ethnicities. The frequency of GSTM1 and GSTT1 null genotypes was higher in patients than in healthy volunteers. Conversely, in East Asians, higher frequencies of the null genotypes were observed in healthy volunteers than patients. Oncology was the most intensively studied TA (57% of the articles) in relation to GSTM1 and GSTT1. In all, these results demonstrate that there is an important gap in the literature in terms of failure to consider a broader range of populations, as well as diseases wherein GSTM1 and GSTT1 variations have clinical and biological implications. To achieve precision/personalized medicine on a global/worldwide scale, with equity and inclusiveness, this knowledge/research gap ought to be remedied in studies of GSTM1 and GSTT1 null genotypes. To the best of our knowledge, this is the largest systematic review conducted to date addressing the GSTM1 and GSTT1 null genotypes worldwide. The analyses from the 1925 articles highlighted the current knowledge gaps in different TAs, ethnicities, and populations. Filling these gaps is of importance, given the role these genes play in relation to the metabolism of substances to which we have frequent contact with, the associations observed between their deletion and diseases such as cancer, in addition to the interethnic differences observed for the deletion frequencies of these genes.
Collapse
Affiliation(s)
- Giovana Nakanishi
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Murilo Pita-Oliveira
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Laísa S Bertagnolli
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Sabrina Torres-Loureiro
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Mariana M Scudeler
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Heithor S Cirino
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Maria Laura Chaves
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Bruno Miwa
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Fernanda Rodrigues-Soares
- Departamento de Patologia, Genética e Evolução, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| |
Collapse
|
4
|
Su X, Ren Y, Li M, Kong L, Kang J. Association of glutathione S-transferase M1 and T1 genotypes with asthma: A meta-analysis. Medicine (Baltimore) 2020; 99:e21732. [PMID: 32846793 PMCID: PMC7447378 DOI: 10.1097/md.0000000000021732] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 06/17/2020] [Accepted: 07/14/2020] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND We performed an updated meta-analysis to clarify the relationship between glutathione S-transferase Mu and theta (GSTM1 and GSTT1, respectively) null/positive genotypes and asthma. METHODS We performed a literature search using PubMed and Web of Science databases in August 2019. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to assess the role of GSTM1 and GSTT1 genotypes in the risk of asthma. RESULTS Overall, we found a significant association with asthma risk in the general population for both the GSTM1 genotype (OR = 1.21; 95% CI: 1.07-1.35; P < .001; I = 69.5%) and the GSTT1 genotype (OR = 1.61; 95% CI: 1.30-2.00; P < .001; I = 83.6%). Moreover, significant associations between both genotypes and asthma risk were also found by age stratification. Furthermore, for GSTM1 we found significant associations in populations living in Asia, Europe, and Russia, but not in Africa. Conversely, for GSTT1, we found a significantly increased risk in populations living in Asia, Europe, Africa, and Russia. In addition, a significant association was found for both genotypes with a sample size <500, but not a sample size >2000. CONCLUSION Our meta-analysis provides evidence that GSTM1 and GSTT1 genotypes could be used as asthma-associated biomarkers.
Collapse
|
5
|
Effects of Glutathione S-Transferase Gene Polymorphisms and Antioxidant Capacity per Unit Albumin on the Pathogenesis of Chronic Obstructive Pulmonary Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:6232397. [PMID: 28951769 PMCID: PMC5603134 DOI: 10.1155/2017/6232397] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/18/2017] [Accepted: 07/31/2017] [Indexed: 01/11/2023]
Abstract
OBJECTIVES To study the effects of GSTM1, GSTT1 gene polymorphisms, and organism antioxidant capacity and related indicators such as antioxidant capacity per unit of albumin (AC/ALB) on chronic obstructive pulmonary disease (COPD). METHODS Using polymerase chain reaction technology, GSTM1 and GSTT1 gene polymorphisms were detected in 33 COPD patients and 33 healthy people. The total antioxidant capacity (TAC) found in serum was determined using the I2/KI potentiometric, KMnO4 microtitration, and H2O2 potentiometric methods. The AC/ALB was defined as the TAC divided by the serum albumin concentration. Logistic regression analysis was carried out with biochemical screening indices, which was found to be closely related with the incidence of COPD. RESULTS The GSTM1 and GSTT1 gene deletion rate in the COPD group was significantly higher than that in the control group (P < 0.05). The differences in serum TAC between the COPD and control groups, GSTM1 (+) and GSTM1 (-) groups, and GSTT1 (+) and GSTT1 (-) groups were statistically significant (P < 0.001). In addition, there was a significant difference in the AC/ALB between the COPD and control groups (P < 0.05). Logistic regression analysis showed that the incidence of COPD was closely related to the AC/ALB (P < 0.05). CONCLUSIONS GSTM1 and GSTT1 gene polymorphisms are closely correlated with the pathogenesis of COPD, while the AC/ALB plays a decisive role in the occurrence and development of COPD.
Collapse
|
6
|
Singh A, Prasad KN, Singh AK, Singh SK, Gupta KK, Paliwal VK, Pandey CM, Gupta RK. Human Glutathione S-Transferase Enzyme Gene Polymorphisms and Their Association With Neurocysticercosis. Mol Neurobiol 2016; 54:2843-2851. [PMID: 27021019 DOI: 10.1007/s12035-016-9779-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 02/04/2016] [Indexed: 01/01/2023]
Abstract
Neurocysticercosis (NCC), caused by cysticerci of Taenia solium is the most common helminthic infection of the central nervous system. Some individuals harboring different stages of cysticerci in the brain remain asymptomatic, while others with similar cysticerci lesions develop symptoms and the reasons remain largely unknown. Inflammatory response to antigens of dying parasite is said to be responsible for symptomatic disease. Reactive oxygen species (ROS) that are generated in inflammatory conditions can damage cellular macromolecules such as lipids, DNA, and proteins. The glutathione S-transferases (GSTs) are critical for the protection of cells from ROS. A total of 250 individuals were included in the study: symptomatic NCC = 75, asymptomatic NCC = 75, and healthy controls = 100. The individuals carrying the deletions of GSTM1 and GSTT1 were at risk for NCC (OR = 2.99, 95 %CI = 1.31-6.82, p = 0.0073 and OR = 1.94, 95 %CI = 0.98-3.82, p = 0.0550 respectively). Further, the individuals with these deletions were more likely to develop symptomatic disease (OR = 5.08, 95 % CI = 2.12-12.18, p = 0.0001 for GSTM1 and OR = 3.25, 95 %CI = 1.55-6.82, p = 0.0018 for GSTT1). Genetic variants of GSTM3 and GSTP1 were not associated with NCC. The total GST activity and levels of GSTM1, GSTT1, and GSTM3 were significantly higher in asymptomatic subjects than in symptomatic and healthy controls. Lower GST activity was observed in individuals with GSTM1 and GSTT1 deletions. The present study suggests that the individuals with GSTM1 and GSTT1 deletions are at higher risk to develop symptomatic disease. The higher GST activity and levels of GSTM1, GSTT1, and GSTM3 are likely to play role in maintaining asymptomatic condition.
Collapse
Affiliation(s)
- Amrita Singh
- Department of Microbiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, U.P, 226014, India
| | - Kashi N Prasad
- Department of Microbiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, U.P, 226014, India.
| | - Aloukick K Singh
- Department of Microbiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, U.P, 226014, India
| | - Satyendra K Singh
- Department of Microbiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, U.P, 226014, India
| | - Kamlesh K Gupta
- Department of Microbiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, U.P, 226014, India
| | - Vimal K Paliwal
- Department of Neurology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, U.P, 226014, India
| | - Chandra M Pandey
- Department of Biostatistics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, U.P, 226014, India
| | - Rakesh K Gupta
- Department of Radiodiagnosis, Sanjay Gandhi Postgraduate institute of Medical Sciences, Lucknow, U.P, 226014, India
| |
Collapse
|
7
|
Iorio A, Polimanti R, Piacentini S, Liumbruno GM, Manfellotto D, Fuciarelli M. Deletion polymorphism ofGSTT1gene as protective marker for allergic rhinitis. CLINICAL RESPIRATORY JOURNAL 2014; 9:481-6. [DOI: 10.1111/crj.12170] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 05/04/2014] [Accepted: 05/29/2014] [Indexed: 12/21/2022]
Affiliation(s)
- Andrea Iorio
- Department of Biology; University of Rome ‘Tor Vergata’; Rome Italy
- Clinical Pathophysiology Center; AFaR - ‘San Giovanni Calibita’ Fatebenefratelli Hospital; Rome Italy
| | - Renato Polimanti
- Department of Biology; University of Rome ‘Tor Vergata’; Rome Italy
| | - Sara Piacentini
- Department of Biology; University of Rome ‘Tor Vergata’; Rome Italy
| | | | - Dario Manfellotto
- Clinical Pathophysiology Center; AFaR - ‘San Giovanni Calibita’ Fatebenefratelli Hospital; Rome Italy
| | - Maria Fuciarelli
- Department of Biology; University of Rome ‘Tor Vergata’; Rome Italy
| |
Collapse
|
8
|
Liang S, Wei X, Gong C, Wei J, Chen Z, Chen X, Wang Z, Deng J. Significant association between asthma risk and the GSTM1 and GSTT1 deletion polymorphisms: an updated meta-analysis of case-control studies. Respirology 2014; 18:774-83. [PMID: 23600494 DOI: 10.1111/resp.12097] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 03/12/2013] [Accepted: 03/25/2013] [Indexed: 11/30/2022]
Abstract
Polymorphisms in GSTM1 and GSTT1 may be associated with asthma risk, yet several studies and meta-analyses have reported inconclusive results. Therefore, an updated meta-analysis was conducted. Literature searches were performed using the Pubmed, Embase and Web of Science databases until October 2012. Variant 'null' genotype was compared with wild-type 'present' in the pooled data. All statistical analyses were performed using STATA 11.0. A total of 26 case-control studies were suitable for inclusion in the meta-analysis. In the overall population, a significant association was found for both the GSTM1 (odds ratio (OR) = 1.452; 95% confidence interval (CI): 1.192-1.770) and GSTT1 polymorphism (OR = 1.792; 95% CI:1.293-2.483). For subgroup analysis by age, GSTM1 significantly increased risk for both children (OR = 1.368; 95% CI: 1.051-1.781) and adults (OR = 1.859; 95% CI: 1.183-2.921). For GSTT1, a significant association was only found in the adult population (OR = 2.312; 95%CI: 1.204-4.439). Based on subgroup analysis by ethnicity, a significant association for GSTM1 was found in Europe (OR = 1.303; 95% CI: 1.018-1.667), Africa (OR = 2.175; 95%CI: 1.560-3.031) and Latin America (OR = 2.265; 95%CI: 1.375-3.729). For GSTT1, significantly increased risk was found only for Asian (OR = 2.105; 95% CI: 1.101-4.025) and Russian (OR = 2.747; 95% CI: 1.071-7.046) populations. This meta-analysis provides evidence that GSTM1 and GSTT1 polymorphisms may be risk factors for asthma.
Collapse
Affiliation(s)
- Siqiao Liang
- Department of Respiratory Medicine, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Wang X, Li W, Liu W, Cai B, Cheng T, Gao C, Mo L, Yang H, Chang L. GSTM1 and GSTT1 gene polymorphisms as major risk factors for bronchopulmonary dysplasia in a Chinese Han population. Gene 2014; 533:48-51. [DOI: 10.1016/j.gene.2013.10.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 09/23/2013] [Accepted: 10/01/2013] [Indexed: 11/28/2022]
|
10
|
Abhimanyu, Bose M. Reporting genetic association studies: the roadblocks and guiding rules for robust results. Lung 2012; 190:587-8; author reply 588. [PMID: 23053565 DOI: 10.1007/s00408-012-9409-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Accepted: 07/02/2012] [Indexed: 10/27/2022]
|