1 Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), No. 1, Shuaifuyuan, Dongdan, Beijing, 100730, China.
2 Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, No. 1, Shuaifuyuan, Dongdan, Beijing, 100730, China.
3 Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, No. 1, Shuaifuyuan, Dongdan, Beijing, 100730, China.
4 Department of Rheumatology, The Second Hospital of Dalian Medical University, No. 467, Zhongshan Road, Shahekou District, Dalian, 116023, Liaoning, China.
5 Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), No. 1, Shuaifuyuan, Dongdan, Beijing, 100730, China. zhangwen91@sina.com.