Sugawara, Hiroyuki
Saito, Atsushi http://orcid.org/0000-0003-3430-884X
Yokoyama, Saori
Tsunematsu, Kazunori
Takahashi, Hiroki
Article History
Received: 12 November 2018
Accepted: 11 February 2019
First Online: 26 February 2019
Ethics approval and consent to participate
: The study was approved by the Sapporo Medical Association ethics board.
: The authors declare that they have no competing interest.
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