Received: 22 September 2020
Accepted: 23 February 2021
First Online: 24 March 2021
: The study was registered with the ISRCTN: ISRCTN11209732 and approved by the Ethics Committee of northwestern and central Switzerland (Ethikkommission Nordwest- und Zentralschweiz; EKNZ): Project 165/13. Informed consent was obtained from all study participants in written form after participants read written study information materials and had the opportunity to clarify any questions. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.