1. Clinical Laboratory of Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
2. Department of Nephrology, The Traditional Chinese Medicine Hospital, Affiliated to Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
3. South China Institute of Microbial Ecology and Health, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
4. Department of Rheumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China