Funding for this research was provided by:
Landeszentrum Gesundheit Nordrhein-Westfalen
Received: 29 September 2020
Accepted: 12 May 2021
First Online: 5 June 2021
: This project was approved by the Ethics Committee of the Faculty of Medicine of the University of Cologne [ethics votes of 26 April 2017, reference number 17-128]. Written informed consent was obtained from all participants in the focus group discussions. No personal data was collected from the participants in the user tests. To ensure the anonymity of these participants, only verbal informed consent was obtained and recorded in anonymised form.
: Not applicable.
: The authors declare that they have no competing interests.