1. Department of Nephrology, Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China
2. Department of Outpatients, 900th Hospital of The Joint Logistics Support Force (People's Liberation Army), Fuzhou, Fujian 350000, P.R. China
3. Department of Urology, Airforce Medical Center (People's Liberation Army), Beijing 100142, P.R. China
4. Department of Pathology, 971st Navy Hospital of PLA, Qingdao, Shandong 266071, P.R. China
5. Department of Urology, 900th Hospital of The Joint Logistics Support Force (People's Liberation Army), Fuzhou, Fujian 350000, P.R. China