Funding for this research was provided by:
Japan Society for the Promotion of Science (19K14029, JP15H01972)
Ministry of Health, Labour and Welfare (H28-Choju-Ippan-002)
Japan Agency for Medical Research and Development (JP18dk0110027, JP18ls0110002, JP18le0110009, and JP19dk0110034)
Program on Open Innovation Platform with Enterprises, Research Institute and Academia (JPMJOP1831)
Longevity Sciences from National Center for Geriatrics and Gerontology (29-42)
Received: 20 November 2019
Accepted: 18 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: The JAGES participants were informed that participation in the study was voluntary and that completing and returning the questionnaire via mail indicated their consent to participate in the study. The JAGES protocol was approved by the Ethics Committee in Research of Human Subjects at the National Center for Geriatrics and Gerontology (No. 992) and Chiba University Faculty of Medicine (No. 2493).
: Not applicable.
: The authors declare that they have no competing interests.