1. From the Department of Internal Medicine, College of Medicine (T.K.L., Z.S.H., S.K.N.), and the Institute of Epidemiology, College of Public Health (K.W.A.C.), National Taiwan University, Taipei; the Department of Family Medicine, Veterans General Hospital, Taichung (Y.S.W.); the Department of Family Medicine, Kaohsiung Medical College, Kaohsiung (H.W.L.); and the Department of Internal Medicine, Tz’u-chi Buddhist General Hospital, Hualien (J.J.L.), Taiwan, Republic of China.