Nishii, Mika
Soutome, Sakiko http://orcid.org/0000-0002-4646-587X
Kawakita, Akiko
Yutori, Hirokazu
Iwata, Eiji
Akashi, Masaya
Hasegawa, Takumi
Kojima, Yuka
Funahara, Madoka
Umeda, Masahiro
Komori, Takahide
Article History
Received: 23 February 2019
Accepted: 21 May 2019
First Online: 8 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was performed in accordance with the 1964 Declaration of Helsinki. Ethical approval was obtained from the Institutional Review Boards (IRB) of Kobe University Hospital (No. 180250), Nagasaki University Hospital (No. 18091008), and Kansai University Hospital (2018164). As this was a retrospective study, the research plan was published on the homepage of the participating hospitals according to the instructions of the IRB in accordance with the guaranteed opt-out opportunity.