Received: 30 December 2020
Accepted: 28 April 2021
First Online: 7 June 2021
: Ethical guidelines [CitationRef removed] and State and Federal Law (Human Research Act SR 810.30) were strictly followed, and a waiver was obtained by the local governmental ethics committee prior to the study (BASEC Nr. Req-. 2018-00561). Written informed consent, according to the directives stipulated by the governmental ethics committee, was obtained from each patient, before the start of the study.
: There are no financial and non-financial competing interests.