1. Gang Wang, MD, Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, China; Ning Zhuo, MD, Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China; and Zhichun Liu, MD, Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, China