Received: 21 April 2020
Accepted: 21 July 2020
First Online: 18 August 2020
Ethics approval and consent to participate
: This study was approved by the Swiss Ethics Committees on research involving humans (Approval # 2017–02328) and was registered at the U. S Clinical Trials Registry as ExternalRef removed.
: All authors state that they have no competing interests to declare. None of the authors accepted any reimbursements, fees or funds from any organization that may in any way gain or lose financially from the results of this study. The authors have not been employed by such an organization. The authors do not have any other competing interest.