Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (179919)
Received: 18 December 2020
Accepted: 26 February 2021
First Online: 7 March 2021
: Written informed consent was obtained from all patients; ethics approval was obtained in all participating centres.
: Not applicable.
: All authors declare that they have no competing interests.