Received: 29 November 2020
Accepted: 23 February 2021
First Online: 9 March 2021
: This retrospective, two-center study was approved by the institutional review board of our facility (Tokushima Red Cross Hospital and Teikyo University Hospital). Written informed consent for the individual patient data used in our analysis as waived because of the retrospective nature of the investigation.
: Consent for publication was obtained in the form of opt-out on the web-site according to the indication from our institutional review board.
: The authors declare that they have no competing interests.