Received: 28 January 2020
Accepted: 3 July 2020
First Online: 9 July 2020
Ethics approval and consent to participate
: The study was approved by the Toho University Medical Center Omori Hospital Ethics Committee, with due consideration of the Helsinki Declaration, patient anonymity, and ethics.
: All authors have given consent for publication.
: The authors declare that they have no competing interests in this study.