1. Affiliations of authors: Department of Internal Medicine (YCL, THC, CKC, HMC, MSW) and Graduate Institute of Clinical Medicine (THC), College of Medicine, and Institute of Epidemiology and Preventive Medicine, College of Public Health (YCL, SLC, HMC, HHC), National Taiwan University, Taipei, Taiwan; School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan (SLSC, AMFY); Department and G