Funding for this research was provided by:
Kanagawa University of Human Services
Received: 9 June 2020
Accepted: 9 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of St. Luke’s International University (No. 16-A076) and Kanagawa University of Human Services (No. 10–57). The participants provided written informed consent before study participation.
: Not applicable.
: The author declares that they have no competing interests.