Fujiwara, Kenji http://orcid.org/0000-0001-5900-9382
Abe, Atsushi
Masatsugu, Toshihiro
Hirano, Tatsuya
Sada, Masayuki
Article History
Received: 22 May 2020
Accepted: 16 September 2020
First Online: 24 September 2020
Compliance with ethical standards
:
: Drs. Kenji Fujiwara, Atsushi Abe, Toshihiro Masatsugu, Tatsuya Hirano, and Masayuki Sada have no conflicts of interest or financial ties to disclose.
: Sada Hospital has its own Institutional Review Board (IRB) that reviews all studies performed in the hospital. The IRB approved the use of the database for research purposes and waived the requirement for informed consent (IRB approval number: S190726-1). All data were fully anonymized before being assessed.