1. Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
3. Department of Ophthalmology, Graduate School of Medical Sciences, Akita University, Akita, Japan
4. Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
5. Hisayama Research Institute for Lifestyle Diseases, Fukuoka, Japan