1. Department of Nuclear Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China;
2. Departments of Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China;
3. Department of Endocrinology, The First Affiliated Hospital of Xi ‘an Jiaotong University, Xi ‘an, China;
4. Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China