*Corresponding to
Xuebing Feng, M.D. and Ph.D., Department of Rheumatology and Immunology,
the affiliated Nanjing Drum Tower
Hospital of Nanjing University
Medical School, Nanjing 210008, P.R.China
(email:
fengxuebing@hotmail.com)
Xiaojun Tang, Ph.D., Department of
Rheumatology and Immunology, Nanjing Drum Tower Hospital, Affiliated
Hospital of Medical School, Nanjing University, Nanjing 210008, China
(email: xjtang09@163.com)