Funding for this research was provided by:
Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JP20K19623 to KM, JP19K11541 to DA)
Grant-in-Aid for KSU Scientific Research and Encouragement of Scientists (K035129 to KM, J018345 to NT, K035124 to DA, K035173 to SS)
Japan Society of Physiological Anthropology Research Grant for Young Scientists
Received: 12 March 2021
Accepted: 27 August 2021
First Online: 6 September 2021
: In accordance with the Declaration of Helsinki, a written informed consent was obtained from all participants after they were provided with information about the purposes, experimental protocols, and possible risks of this study. This study was reviewed and approved by the ethical committee established in Kyushu Sangyo University before starting the data collection (H28-0001-1).
: Not applicable.
: The authors declare that they have no competing interests.