Funding for this research was provided by:
Mathys Ltd., Bettlach, Switzerland
Received: 2 April 2020
Accepted: 17 January 2021
First Online: 23 January 2021
Ethics approval and consent to participate
: All procedures performed were in accordance with the 1964 Helsinki Declaration. Ethical approval was obtained (FF 154/2017) from the Ethics Commission of the state medical association Hessen, Frankfurt, Germany (“Ethik-Kommission bei der Landesärztekammer Hessen”). All patients gave their verbal and written permission to participate prior to inclusion.
: Not applicable.
: KPK and PR serve as instructors for Mathys Ltd., Bettlach, Switzerland. PR also serves as medical advisor. All other authors declare that they have no competing interests.