Institution: | 1.Division of Public Health, Department of Social Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-kamimachi, Itabasi-ku, Tokyo, 173-8610, Japan ;2.Department of Public Health and Epidemiology, Faculty of Medicine, Oita University, 1-1 Hasama-machi Idaigaoka, Yufu, Oita, 879-5593, Japan ; |