1 Division of Gastroenterology, Department of Internal Medicine, Taoyuan Armed Forces General Hospital, Taoyuan City, Taiwan and Tri-Service General Hospital, Taipei, Taiwan.
2 Department of Ophthalmology, Tri-Service General Hospital, Taipei, Taiwan.
3 Division of Endocrinology and Metabolism, Department of Internal Medicine, Tri-Service General Hospital, Taipei, Taiwan.
4 Division of Gastroenterology, Department of Internal Medicine, Tri-Service General Hospital, Taipei, Taiwan, email: ndmchsu@yahoo.com.tw.