Masanori, Akira http://orcid.org/0000-0002-4097-8105
Article History
Received: 9 October 2020
Accepted: 11 January 2021
First Online: 10 March 2021
Ethics approval and consent to participate
: Our Institutional Review Board approved that informed consent was unnecessary, because this study was retrospective and patient’s name was blinded.
: Not applicable.
: The author declares that he/she have no competing interests.