Saito, Shota
Tran, Huyen Thi Thanh
Qi, Ruan
Suzuki, Kenji
Takiguchi, Toru
Ishigami, Kazuo
Noto, Shinichi
Ohde, Sachiko
Takahashi, Osamu
Article History
Received: 27 November 2020
Accepted: 29 January 2021
First Online: 11 February 2021
Ethics approval and consent to participate
: The study was approved by the medical ethics committee of Niigata University of Health and Welfare (No. 18385–200318; date April 18, 2020), and it was conducted in accordance with the principles of the 1964 Declaration of Helsinki and its later amendments. Informed consent was obtained from all participants or, if subjects were under 18, from a parent or legal guardian. The data were completely anonymous in the survey.
: Not applicable.
: The authors declare that they have no competing interests.