Received: 27 August 2021
Accepted: 27 January 2022
First Online: 2 February 2022
: This study was performed in accordance with the Declaration of Helsinki and was approved by the Medical Ethics Committee of the Kobe City Medical Center General Hospital (Kobe, Japan). Written informed consent was obtained from all participants. We applied the opt-out method to obtain informed consent for this observational study involving the use of medical records. Patients who did not give their consent were excluded.
: Not applicable
: The authors declare that they have no competing interests.