1 Institute of Metabolism and Endocrinology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China 2 Clinical Research, Diabetes and Endocrinology, Merck Research Laboratories, 126 East Lincoln Avenue, RY34B-148, Rahway, NJ 07065-0900, USA 3Department of Nutritional Science, Rutgers University, New Brunswick, NJ 08901, USA 4Division of Endocrinology, Metabolism an...