1. 1Department of Metabolism and Endocrinology and the Metabolic Syndrome Research Center of Central South University, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
2. 2The State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
3. 3Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA