1. Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Shandong, P.R. China
2. Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong University, Shandong, P.R. China
3. Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Shandong, P.R. China
4. Department of Geriatrics, Weihai Municipal Hospital Affiliated to Shandong University
5. Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Shandong, P.R. China