1. Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital (PUMCH), Chinese Academy of Medical Science, Beijing, China.
2. Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China.
3. Institute of Medical Science, University of Toronto, Toronto, Canada.
4. Department of Pathology, Peking Union Medical College Hospital (PUMCH), Chinese Academy of Medical Science, Beijing, China.