Text and Data Mining valid from 2019-03-28
Received: 1 November 2017
Accepted: 27 February 2019
First Online: 28 March 2019
Ethics approval and consent to participate
: The cohort wasn’t originally for this study and the participant consent was verbal. Therefore, modified protocol was retrospectively approved by the ethics committee of Shirasagi Hospital (registration number J2017015). Approval for an opt-out consent method was given.
: Not applicable.
: The authors declare that they have no conflicts of interest concerning this article.
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