Imai, Hisao http://orcid.org/0000-0003-3097-4255
,
Minemura, Hiroyuki
Sugiyama, Tomohide
Yamada, Yutaka
Kaira, Kyoichi
Kanazawa, Kenya
Kasai, Takashi
Kaburagi, Takayuki
Minato, Koichi
Article History
Received: 28 December 2017
Accepted: 1 May 2018
First Online: 8 May 2018
Compliance with ethical standards
:
: None of the authors have any financial or personal relationships with people or organizations that could inappropriately influence this work.
: The institutional review board of each institution approved the study protocol.
: The need for informed consent was waived by the Institutional Review Boards of each participating institution because of the retrospective nature of the study.