Gobara, Hideo http://orcid.org/0000-0003-4594-0031
Nakatsuka, Atsuhiro
Shimizu, Kanichiro
Yamanaka, Takashi
Matsui, Yusuke
Iguchi, Toshihiro
Hiraki, Takao
Yamakado, Koichiro
Article History
Received: 18 December 2018
Accepted: 11 February 2019
First Online: 2 April 2019
Compliance with ethical standards
:
: Hideo Gobara and Takao Hiraki received funding from Okayama Prefecture, JPSS and AMED. Other authors have no conflict of interest to declare.
: Each institutional review board approved this retrospective multicenter study and waived the requirement for obtaining informed consent to use the patients’ medical data. All procedures performed were in accordance with the ethical standards of the institutional research committees and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.