Handa, Takaya
Kakita, Hiroko
Tateishi, Yu
Endo, Tomomi
Suzuki, Hiroyuki
Katayama, Toshiro
Tsukamoto, Tatsuo
Muso, Eri
Article History
Received: 26 April 2017
Accepted: 11 March 2018
First Online: 21 March 2018
Compliance with ethical standards
:
: The authors declare no conflicts of interest.
: This was a retrospective study and used a preexisting database while employing the highest privacy policy standards. Therefore, the requirement of informed consent was waived.