1. From the Departments of Radiology (H.W., X.H., X.C., S.T., C.L.), Rheumatism (G.Z., Y.C.), and Orthopedics of Traditional Chinese Medicine (M.C.), Guangdong General Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Rd, Guangzhou 510080, Guangdong, China; Department of CT Collaboration, Siemens Healthcare, Guangzhou, China (L.S.); and Department of Information Media Industry, Guangzhou Public Utility Technician College, Guangzhou, China (X.L.).