1. Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, 610041 Chengdu, China
2. Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 39216 Jackson, MS, U.S.A.
3. Department of Geriatrics, The First Hospital of Jilin University, 130021 Changchun, China
4. Department of Endocrinology, Affiliated Hospital of Weifang Medical University, 261000 Weifang, China