Horii, Takeshi
Atsuda, Koichiro
Article History
Received: 24 December 2019
Accepted: 18 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the ethical guidelines for medical and health research involving human subjects. The ethics board of the T Kitasato University approved the study (Control number: 17078). The need for active informed consent was waived in detriment of the application of an opt-out method. Briefly, disclose the purpose of the study to participants, and given the opportunity to opt-out of being included in the research.
: Not applicable.
: The authors declare that they have no competing interests.