Tehran University of Medical Sciences, Tehran University of Medical Sciences, Tehran University of Medical Sciences - Liver and Pancreatobiliary Research Center, Isfahan University of Medical Sciences, Semnan University of Medical Sciences, Shahid Sadoughi University of Medical Sciences - Department of Occupational Medicine, Shahid Sadoughi University of Medical Sciences - Department of Occupational Health, Rafsanjan University of Medical Sciences, Tehran University of Medical Sciences - Liver and Pancreatobiliary Research Center, Tehran University of Medical Sciences - Department of Epidemiology and Biostatistics and Isfahan University of Medical Sciences