1. Department of Nephrology, The First People's Hospital of Yancheng, Yancheng, Jiangsu 224005, P.R. China
2. Department of Clinical Laboratory, Linyi Traditional Hospital, Linyi, Shandong 276003, P.R. China
3. Department of Laboratory Medicine, The Fifth People's Hospital of Wuxi Affiliated to Jiangnan University, Wuxi, Jiangsu 214005, P.R. China
4. Department of Pathology, The First People's Hospital of Yancheng, Yancheng, Jiangsu 224005, P.R. China