1. From the Departments of Internal Medicine (T.K.) and Radiology (M.N.), Niigata Rosai Hospital, Joetsu; Center for Public Health Informatics, National Institute of Public Health, Wako (C.K.); Association of Niigata Occupational Health, Kashiwazaki (T.I.); Department of Pharmacy, Ritsumeikan University, Kusatsu (K.S.); and Department of Internal Medicine, International University of Health and Welfare Clinic, Otawara (G.S.), Japan.