1 Department of Gastroenterology, City of Hope National Medical Center, Duarte, CA.
2 Division of Endocrinology and Metabolism, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
3 Department of Internal Medicine, Graduate Institute of Preventive Medicine, School of Public Health, National Taiwan University, Taipei, Taiwan.
4 Department of Clinical Diabetes, Endocrinology, and Metabolism, City of Hope National Medical Center, Duarte, CA, Division of Endocrinology, Metabolism, and Nutrition, Department of Internal Medicine, Harbor-UCLA Medical Center, Torrance, CA.