Ashida, Akira http://orcid.org/0000-0001-5972-946X
Matsumura, Hideki
Sawai, Toshihiro
Fujimaru, Rika
Fujii, Yuko
Shirasu, Akihiko
Nakakura, Hyogo
Iijima, Kazumoto
Funding for this research was provided by:
Ministry of Health, Labour and Welfare (H26-nanchitou (nan)-ippan-036)
Article History
Received: 10 October 2017
Accepted: 31 December 2017
First Online: 19 January 2018
Compliance with ethical standards
:
: Kazumoto Iijima had endowed department by Astellas Pharma, and has received grants from Daiichi Sankyo Co., Ltd., Toshihiro Sawai received travel fees from Alexion Pharma. The other authors declare that they have no conflicts of interest.
: The survey was conducted in accordance with the ethical principles contained within the 1964 Declaration of Helsinki, and the ethical guidelines for epidemiological studies issued by the Ministry of Health, Labour and Welfare, Japan. The survey was approved by the ethics board of Osaka Medical College (approval number: 1823) before the study commenced.
: For this type of study, formal consent was not required.