1 Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime, 791-0295, Japan. miyake.yoshihiro.ls@ehime-u.ac.jp.
2 Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan. miyake.yoshihiro.ls@ehime-u.ac.jp.
3 Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime, 791-0295, Japan.
4 Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan.
5 Department of Health Promotion, National Institute of Public Health, Saitama, Japan.
6 Department of Social and Preventive Epidemiology, School of Public Health, The University of Tokyo, Tokyo, Japan.
7 Health Tourism Research Fields, Graduate School of Tourism Sciences, University of the Ryukyus, Okinawa, Japan.