Received: 28 July 2020
Accepted: 14 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the local ethics committee northwestern and central Switzerland (EKNZ) for the multicenter randomized study and for the retrospective data analysis (EKNZ numbers 2012–036; 2016–01740). Written Informed consent was obtained for all patients.
: Informed consent process included written consent for publication of clinical data and images.
: None of the authors had any conflicts of interest. No disclosures need to be made.