1 School of Clinical Medicine; Peking Union Medical College and Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, 100010 Beijing, China.
2 Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, 100010 Beijing, China.
3 Department of Radiology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, No.23 Art Gallery Backstreet, 100010 Beijing, China.
4 Department of Traditional Chinese Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, 100010 Beijing, China. Electronic address: casio1981@163.com.