Text and Data Mining valid from 2019-12-01
Received: 26 July 2019
Accepted: 17 December 2019
First Online: 23 December 2019
Ethics approval and consent to participate
: The ethical committee of t Toyota regional medical center approved this study (approval number: 30-kenrin10). The data used in this study was anonymised before its use.
: Not applicable.
: The authors declare that they have no competing interests.