1. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P.R. China
2. Institute of Nephrology, Zhong Da Hospital, Southeast University, Nanjing, China
3. Department of Medicine, Renal Division, Emory University, Atlanta, Georgia
4. Department of Nephrology, Shanghai General Hosptial, Shanghai Jiaotong University, Shanghai, China
5. Department of Gastroenterology, Jiangsu Province Geriatric Hospital, Nanjing, China
6. Department of Pediatric Nephrology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
7. Division of Nephrology, The 3rd People's Hospital of Datong, Shanxi Medical University, Taiyuan, China.