1. Department of Endocrinology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China.
2. Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China.
3. Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Jinan, China.
4. School of Clinical Medicine, Ningxia Medical University, Yinchuan, China.
5. Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan, China.
6. Scientific Center, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China.
7. Department of Endocrinology and Metabolism, The First Affiliated Hospital of China Medical University, Shenyang, China.