1. College of Public Health, Southwest Medical University, Luzhou, Sichuan Province, China
2. Department of Epidemiology, College of Preventive Medicine, Third Military Medical University, Chongqing, China
3. The Second Clinical College, Chongqing Medical University, Chongqing, China
4. Department of Endocrinology, Northern Theater Command General Hospital, Shenyang, China
5. NCO School of Army Medical University, Shijiazhuang, China
6. Department of Endocrinology and Metabolism, Southwest Hospital, Third Military Medical University, Chongqing, China
7. Outpatient Clinic of Dali Retreat Center for Former Cadres of Yunnan Military Region, Dali, China