Received: 26 August 2020
Accepted: 15 October 2020
First Online: 23 October 2020
Ethics approval and consent to participate
: The institutional review board of Kanagawa Cardiovascular and Respiratory Center, Kanagawa, Japan approved the study protocol with written or verbal informed consent waiver due to the retrospective nature of this study. Information about the research was made available to research subjects, and we ensured that they had the opportunity to refuse to allow the research to be carried out.
: Not applicable.
: All of the authors, except one, report they have no conflict of interest to disclose. Tomohisa Baba has received lecture fee from AMCO incorporated.