Nishimura, Junya
Tanaka, Hiroaki
Yamakoshi, Yoshihito
Hiramatsu, Soichiro
Tamura, Tatsuro
Toyokawa, Takahiro
Muguruma, Kazuya
Maeda, Kiyoshi
Hirakawa, Kosei
Ohira, Masaichi
Article History
Received: 17 August 2018
Accepted: 28 March 2019
First Online: 9 April 2019
Compliance with ethical standards
:
: Our investigation was carried out according to the Declaration of Helsinki. All experimental procedures after 2013 were approved as no. 3138 by the Osaka City University ethics committee, and all patients had provided informed consent for collection and analysis of the specimens. On the other hand, because the other experimental procedures up to 2013 were only all-inclusive consent, we are showing opt-out form as an observational study.
: All authors declare that there is no conflict of interest in the present study.