Yamamoto, Shintaro
Oiwa, Hiroshi http://orcid.org/0000-0001-8924-8616
Article History
Received: 6 January 2020
Accepted: 10 February 2020
First Online: 27 February 2020
Compliance with ethical standards
:
: The authors have no conflicts of interest to declare.
: This study complied with the Declaration of Helsinki, and the institutional review boards of the Hiroshima City Hiroshima Citizens Hospital approved this study (approval number: 2019–157). The need to obtain informed consent from the patients was waived in accordance with the regulations for retrospective cohort studies. Information for patients regarding this study was provided on our hospital’s website.