Tadokoro, Rie http://orcid.org/0000-0001-7986-0262
Iida, Tatsuya
Mikura, Kentaro
Imai, Hideyuki
Murai, Norimitsu
Kaji, Mariko
Hashizume, Mai
Kigawa, Yasuyoshi
Endo, Kei
Iizaka, Toru
Otsuka, Fumiko
Iso, Yoshitaka
Sanbe, Takeyuki
Nagasaka, Shoichiro
Article History
Received: 15 December 2018
Accepted: 29 June 2019
First Online: 6 July 2019
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: The study was conducted after approval by the institutional review board of Showa University Fujigaoka Hospital (Date of approval: Aug 15, 2016, Approval number: 2016045). The summary of the study objectives and research details was acknowledged on our website because of the retrospective design. An appropriate opportunity for refusal regarding use of medical records was provided. All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.