1. Department of Genetic Epidemiology; SNP Genetics Inc.; Sogang University; Seoul Korea
2. Department of Internal Medicine and Liver Research Institute; Seoul National University; Seoul Korea
3. Department of Gastroenterology; Ajou University School of Medicine; Suwon Korea
4. Department of Internal Medicine; Ulsan University Hospital; Ulsan Korea
5. Department of Life Science; Sogang University; Seoul Korea