Funding for this research was provided by:
Béatrice Ederer-Weber Foundation
Received: 18 July 2020
Accepted: 4 March 2021
First Online: 13 April 2021
: The PROCAS study has been approved as a multi-centre study by the Ethics Committee Zurich and by all reviewer boards accountable for the participating cancer registries (BASEC Number: 2016-00608). All procedures involving human participants were in accordance with the Helsinki Declaration of 1975, as revised in 1983.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare no competing interests.