Received: 10 February 2021
Accepted: 17 February 2021
First Online: 15 March 2021
Ethics approval and consent to participate
: All procedures involving human participants performed in this study were approved by the institution’s Research Ethics Board (CER-VD 278/10) and were in accordance with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.