Funding for this research was provided by:
Japan Society for the Promotion of Science (JP19K11743)
Received: 10 January 2021
Accepted: 30 March 2021
First Online: 13 April 2021
: This cross-sectional study was conducted in accordance with the ethical guidelines of the 1975 Declaration of Helsinki as revised in 1983 and was approved by the Ethics Committee of Ehime University Hospital (approval ID number: 1012004, 1709008; University Hospital Medical Information Network ID: UMIN000010659, UMIN 000030222). All study participants provided informed consent.
: Not applicable.
: The authors declare that they have no competing interests.