1 Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.
2 Department of Family Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.
3 Center for Geriatrics and Gerontology, Taipei Veterans General Hospital, Taipei, Taiwan.
4 Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.
5 Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan; Cheng Hsin General Hospital, Taipei, Taiwan.
6 Taiwan Society for Metabolic and Bariatric Surgery, Taoyuan, Taiwan; Department of Surgery, Min-Sheng General Hospital, Taoyuan, Taiwan.
7 Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan. Electronic address: chency@vghtpe.gov.tw.