1. Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center , Xi’an, Shaanxi 710061 , China
2. Global Health Institute, Health Science Center, Xi’an Jiaotong University , Xi’an 710061 , China
3. Department of Endocrinology, The First Affiliated Hospital of Xi’an Jiaotong University Health Science Center , Xi’an, Shaanxi, 710061 , China
4. Endemic Disease Control Institute of Shaanxi Province , Xi’an, Shaanxi, 710003 , China
5. Ningshan County People’s Hospital , Ningshan, Ankang, Shaanxi, 711600 , China
6. Institute for Experimental Endocrinology, Charité–Universitätsmedizin Berlin , Berlin, 10115 , Germany