Jamiyan, Tsengelmaa
Shiraki, Takayuki
Kurata, Yoshihiro
Ichinose, Masanori
Kubota, Keiichi
Imai, Yasuo
Article History
Received: 21 January 2020
Accepted: 1 June 2020
First Online: 22 June 2020
Ethics approval and consent to participate
: 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.