Hashimoto, Hidenobu
Fukushima, Yoshimitsu
Kumita, Shin-ichiro
Tomiyama, Takeshi
Kiriyama, Tomonari
Article History
Received: 26 January 2018
Accepted: 15 March 2018
First Online: 19 March 2018
Compliance with ethical standards
:
: The authors have no conflict of interest to declare.
: The institutional review board approved this retrospective study and the requirement to obtain informed consent was waived (28-10-655). This study was performed in accordance with the ethical standards of the Declaration of Helsinki.