1. Department of Pediatrics, The Affiliated Wuxi No. 2 People's Hospital of Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
2. Department of Pediatrics, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
3. Department of Endocrinology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China