1 Department of Rheumatology and Clinical Immunology, The First Hospital of Xiamen University, Xiamen 361003, China.
2 Buffalo General Medical Center, State University of New York at Buffalo School of Medicine, Buffalo, NY 14203, USA.
3 Department of Rheumatology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, China.
4 Division of Allergy, Immunology and Rheumatology, Department of Medicine, State University of New York at Buffalo School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA.