Text and Data Mining valid from 2020-03-24
Received: 4 November 2019
Accepted: 17 March 2020
First Online: 24 March 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the National Hospital Organization Nagasaki Medical under protocol number 2019079, approved on October 10, 2019, with opt-out consent to obtain patient data from the medical records.
: Not applicable.
: The authors declare no conflicts of interest in association with the present study.