Funding for this research was provided by:
Grants-in-Aid for Scientific Research (JP19K14412)
Text and Data Mining valid from 2020-04-05
Received: 13 February 2020
Accepted: 17 March 2020
First Online: 5 April 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee at the Chiba University Graduate School of Medicine (Reference Number: 3441). Written explanations were provided to participants in advance on each item related to informed consent, which describes the purpose of the survey, protection of their personal information, and the voluntary nature of participation. Participants’ response to the survey was regarded as giving consent for participation.
: Not applicable.
: The authors declare that they have no competing interests.