1. Department of Rheumatology, The Second Affiliated Hospital, (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China
2. Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China
3. Department of Rheumatology, Shenzhen Hospital of Chinese Medicine, Shenzhen, Guangdong 518033, P.R. China
4. Department of Rheumatology, Dongguan Hospital of Chinese Medicine, Dongguan, Guangdong 523005, P.R. China
5. Department of Rheumatology, Guangzhou Hospital of Chinese and Western Medicine, Huadu, Guangdong 510800, P.R. China