Funding for this research was provided by:
Ministry of Health, Labour and Welfare (19LA2002)
the National Center for Global Health and Medicine (30-6)
JSPS KAKENHI (20K10467)
Received: 18 September 2020
Accepted: 26 January 2021
First Online: 4 February 2021
Ethics approval and consent to participate
: This study was approved by the ethical committee of the International University of Health and Welfare #19-Im-013. The survey participants consisted of individuals recruited by a research agency. At the time of their registration with the agency, the individuals provided their demographic information and agreed that they would participate in future other surveys with written informed consent. Written consent was obtained from participants at the start of internet survey.
: Not Applicable.
: The authors declare that they have no competing interests.