Kazawa, Kana
Kodama, Ayuto
Sugawara, Kaoru
Hayashi, Mikio
Ota, Hidetaka
Son, Daisuke
Ishii, Shinya
Article History
Received: 13 October 2021
Accepted: 27 January 2022
First Online: 7 February 2022
Declarations
:
: The study is performed in line with the Declaration of Helsinki. The purpose and objectives of the study, protection of privacy, freedom to participate in the study, and publication of the study results were explained in writing and orally by the researchers, and written informed consent was obtained from each participant. Approval for this study was obtained from the ethical committee for epidemiology of Hiroshima University and the ethics committee of Akita University.
: Not applicable.
: The authors declare that they have no competing interests.