Funding for this research was provided by:
Edwards Lifesciences (n.a.)
Received: 6 August 2020
Accepted: 5 October 2020
First Online: 14 October 2020
Ethics approval and consent to participate
: The study was assessed by the site’s ethical committee (University of Giessen, Germany) which stated that no approval and no patient informed consent was necessary because of the retrospective nature and the use of anonymised data.
: Not applicable.
: Peter Bramlage received research funding from Edwards Lifesciences unrelated to the present work. The other authors have no conflict of interest to disclose.