Text and Data Mining valid from 2020-04-13
Received: 18 January 2020
Accepted: 2 April 2020
First Online: 13 April 2020
Ethics approval and consent to participate
: Our study was approved by the ethics committee of Awaji Medical Center (No. 30–59), and the need for patient consent was waived due to the retrospective design of the study.
: Not applicable.
: The authors declare that they have no competing interests to declare.