1. Department of Obstetrics; Maternal and Children Health's Hospital; Weifang; China
2. Graduate school; Second Military Medical University; Shanghai; China
3. Department of Endocrinology; Fujian Institute of Endocrinology; Union Hospital of Fujian Medical University; Fuzhou; China
4. Department of Endocrinology; 210 Hospital of Chinese People's Liberation Army; Dalian; China
5. Department of Rheumatology; The First Affiliated Hospital of Nanjing Medical University; Nanjing; China
6. Department of Internal Medicine; Maternal and Children Health's Hospital; Weifang; China