Katsura, Masaki
Sato, Jiro
Akahane, Masaaki
Tajima, Taku
Furuta, Toshihiro
Mori, Harushi
Abe, Osamu
Article History
Received: 30 April 2018
Accepted: 14 August 2018
First Online: 24 August 2018
Compliance with ethical standards
:
: No funding was received for this study.
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required.
: For this type of retrospective study formal consent is not required.