Text and Data Mining valid from 2020-01-13
Received: 15 May 2019
Accepted: 8 January 2020
First Online: 13 January 2020
Ethics approval and consent to participate
: All participants gave written informed consent. The present study followed the recommendations of the Declaration of Helsinki and was approved by the ethics committee of Saitama Medical University (18049.01).
: This manuscript does not report personal data such as individual details, images or videos; therefore, consent for publication is not applicable.
: The authors declare that they have no conflict of interest.