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Article History

Received: 7 November 2018

Accepted: 26 July 2019

First Online: 7 August 2019

Ethics approval and consent to participate

: The Research Ethics Review Board of the Graduate School of Medicine at the University of Tokyo approved the study procedures (11945-(1)). This also covers all other participating hospitals’ ethical approval. We prepared a website that contains a full explanation of the purpose and procedures of this study. Before the baseline survey, candidates will be asked to read the explanation in which they will be fully informed that participation in the study is voluntary, and they can refuse to participate or withdraw consent for any reason, which would have no negative consequences for them. In addition, participants will be explained that the findings of this study will be disseminated through publications, presentations, and websites without participants’ personal information. If there are any unclear points about the purpose and procedures of this study, the candidate can ask the researcher (KK) questions by an email or a telephone. Participants who will be interested in participating in this study will be asked to check agree option and type their names, hospital names where they are working, and their email addresses to indicate their consent to participate in the study on the website. This consent information will be sent to the research center and preserved.The study protocol was registered at the UMINCTR (ID = UMIN000033521). In case we need to submit important revisions to the protocol, we will obtain approval to do so from the Research Ethics Review Board of the Graduate School of Medicine at the University of Tokyo and will revise the protocol on the UMINCTR website.

: Not applicable.

: The authors declare that they have no competing interests.