Hosoda, Kei http://orcid.org/0000-0002-9787-2889
Washio, Marie
Mieno, Hiroaki
Moriya, Hiromitsu
Ema, Akira
Ushiku, Hideki
Watanabe, Masahiko
Yamashita, Keishi
Article History
Received: 19 July 2018
Accepted: 10 December 2018
First Online: 5 January 2019
Compliance with ethical standards
: This study was conducted in accordance with the 1995 Declaration of Helsinki (as revised in Brazil 2013) and was approved by the Kitasato University School of Medicine Research Ethics Committee. The requirement for informed consent was waived because of the study’s retrospective design. The manuscript was written according to the STROBE Statement.
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required.