1. Department of Endocrinology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
2. Department of Endocrinology, Qilu Hospital of Shandong University, Jinan 250012, China
3. Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
4. Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL 32611, USA