Received: 12 December 2020
Accepted: 1 March 2021
First Online: 13 March 2021
: The study was approved by the Cantonal Ethics Committee of Zurich, Switzerland under the Protocol Number BASEC 2017-00801 and adheres to the principles of reported research on human beings set forth in the Helsinki Declaration.Written informed consent was obtained from the study participants.
: Not applicable.
: The authors declare that they have no competing interests.