Funayama, Emi
Yamamoto, Yuhei
Oyama, Akihiko
Murao, Naoki
Hayashi, Toshihiko
Maeda, Taku
Furukawa, Hiroshi
Osawa, Masayuki
Article History
Received: 4 May 2018
Accepted: 13 February 2019
First Online: 28 February 2019
Compliance with ethical standards
: Informed consent was obtained from all patients. This study was approved by the institutional review board of the Hokkaido University Hospital.
: The authors declare that they have no conflict of interest.