Hayama, S.
Senmaru, N.
Hirano, S.
Article History
Received: 9 June 2019
Accepted: 28 February 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: This study was approved by the Steel Memorial Muroran Hospital Ethics Committee. Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.