Text and Data Mining valid from 2020-05-05
Received: 7 December 2019
Accepted: 27 March 2020
First Online: 5 May 2020
Ethics approval and consent to participate
: This conventional observational study was approved by the Committee of Medical Ethics of Matsuda Hospital (10 May 2018; Code Number 30-3). Informed consent was obtained.
: The authors declare that they have no competing interests.