1. Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health , Boston, MA , USA
2. Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine , Tokyo , Japan
3. Department of Epidemiology, Boston University School of Public Health , Boston, MA , USA
4. Division of Public Health, Kitasato University School of Medicine , Kanagawa , Japan