1. From the Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan (P.-C.C., K.-L.C.); Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, and National Taiwan University, College of Medicine, Taipei, Taiwan (S.-H.Y., M.-F.K.); and National Taiwan University Health Data Research Center, Taipei, Taiwan (I.-J.T.).