Nishi, Hidehisa
Ikeda, Hiroyuki
Ishii, Akira http://orcid.org/0000-0003-4234-2749
Kikuchi, Takayuki
Nakahara, Ichiro
Ohta, Tsuyoshi
Sakai, Nobuyuki
Imamura, Hirotoshi
Takahashi, Jun C.
Satow, Tetsu
Okada, Tomohisa
Miyamoto, Susumu
Article History
Received: 13 January 2021
Accepted: 8 June 2021
First Online: 10 October 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Given the completely observational nature of the study, consent to participate in this study was obtained with an opt-out approach. The study was approved by the ethics committees of each participating institution.