Okubo, Aiko
Nakashima, Ayumu http://orcid.org/0000-0002-7838-1494
Doi, Shigehiro
Ueno, Toshinori
Sasaki, Kensuke
Esaki, Takashi
Masaki, Takao
Article History
Received: 18 December 2017
Accepted: 14 February 2018
First Online: 24 February 2018
Compliance with ethical standards
:
: All of the authors have declared that no conflict of interest exist.
: This study was performed in accordance with the guidelines contained within the Declaration of Helsinki and the protocol was licensed by the hospital ethics committee of Hiroshima University Hospital (approval number: E-726, registered on March 29, 2017).
: Written informed consent was not required because of the non-intervention and retrospective design.