1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan Hsien, Taiwan, Republic of China.
2. Department of Pathology, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan Hsien, Taiwan, Republic of China.
3. Department of General Surgery, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan Hsien, Taiwan, Republic of China.