Kurata, Yoshihiro
Shiraki, Takayuki
Ichinose, Masanori
Kubota, Keiichi
Imai, Yasuo
Article History
Received: 12 October 2020
Accepted: 9 March 2021
First Online: 22 March 2021
Declarations
:
: The study was approved by the institutional ethical committees. Due to the retrospective study design and the anonymization of data, consent to participate was not necessary.
: Not applicable.
: The authors declare that they have no competing interests.