1. Department of Neurosurgery, Peking Union Medical College, Beijing 100730, China
2. Key Laboratory of Endocrinology of National Health and Family Planning Commission, Department of Endocrinology, Peking Union Medical College, Beijing 100730, China
3. Department of Rheumatology, Peking Union Medical College, Beijing 100730, China
4. Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China