I-Wen Chen1, Cheng-Wei Lin2. 1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan City, Taiwan. 2. Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan City, Taiwan mushiau@gmail.com.