1. Department of Pediatric Nephrology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, P.R. China
2. Department of Internal Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, P.R. China
3. Department of Rheumatism and Immunology, Children’s Hospital of Nanjing Medical University, Nanjing, Jiangsu, P.R. China