Tsutsumi, Koichiro
Ueki, Toru
Noma, Yasuhiro
Omonishi, Kunihiro
Ohno, Kyotaro
Kawahara, Soichiro
Oda, Takashi
Kato, Hironari
Okada, Hiroyuki
Article History
Received: 12 September 2020
Accepted: 21 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This study was conducted in compliance with the principles of the Declaration of Helsinki, and the protocol was approved by the ethics committee of Fukuyama City Hospital (No. 446). Instead of written or verbal informed consent to participate, this study guaranteed the opportunity of participation refusal by disclose information about this study on our notice board in our institution (opt-out methods). The opt-out method of consent was approved by the Ethics Committee in our hospital.
: Not applicable.
: The authors declare that they have no competing interests.