Funding for this research was provided by:
Innovation Fund of the Federal Joint Committee, Germany (01NVF17001, 01NVF17001, 01NVF17001)
Received: 10 December 2020
Accepted: 15 September 2021
First Online: 6 October 2021
: The study has been approved by the Ethics Committee of both the Medical Faculty University Hospital of Cologne (ref. nr. 17/-327) and the North Rhine Medical Association (ref. nr. 2018191), thus all methods were carried out in accordance with relevant guidelines and regulations. Informed consent was obtainied from all the participants in the study. They received a letter of consent for participation, including information about our publication intention, prior to the focus group or interviews. All participants obtained a copy of the consent form. The transcripts do not contain data of any individual person.The study is registered at the German clinical trials register (DRKS00014047).
: Not applicable.
: Prof. Dr. Holger Pfaff is an Associate Editor in BMC Health Services Research. Furthermore, the remaining authors declare no conflicts of interest.