Funding for this research was provided by:
Ministry of Health, Labour and Welfare (H27-iryo-ippan-007)
Text and Data Mining valid from 2020-04-15
Received: 15 November 2019
Accepted: 17 March 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: This research project including the informed consent procedure for participation was approved by the Ethics Committee of the Toho University School of Medicine (No. 27045). We conducted an anonymous self-administered questionnaire survey, and it was considered that consent to participation in the study was obtained by answering the questionnaire.
: The Ethics Committee of the Toho University School of Medicine approved the informed consent procedure for publication (No. 27045). The questionnaire stated that the data will be published, and it was considered that consent for publication was obtained by answering the questionnaire.
: The authors declare that they have no competing interests.