Funding for this research was provided by:
Nuclear Regulation Authority, Japan
Text and Data Mining valid from 2019-07-26
Received: 13 March 2019
Accepted: 10 July 2019
First Online: 26 July 2019
Ethics approval and consent to participate
: The study protocol was approved by the institutional review board of Osaka University Hospital.
: Not applicable.
: The authors declare that they have no competing interests.