Shimizu, Yasuhiro http://orcid.org/0000-0002-3979-953X
Takamatsu, Shigeyuki http://orcid.org/0000-0002-0743-4413
Yamamoto, Kazutaka http://orcid.org/0000-0002-3425-4186
Maeda, Yoshikazu http://orcid.org/0000-0002-3040-5549
Sasaki, Makoto
Tamamura, Hiroyasu
Bou, Sayuri
Kumano, Tomoyasu
Gabata, Toshifumi http://orcid.org/0000-0002-9413-3431
Article History
Received: 16 March 2018
Accepted: 4 June 2018
First Online: 20 June 2018
Compliance with ethical standards
:
: We declare no actual or potential conflicts of interest.
: This retrospective study was approved by the research ethics committee of our institution.