Received: 27 January 2020
Accepted: 23 November 2020
First Online: 20 January 2021
Change Date: 15 April 2021
Change Type: Update
Change Details: The funding note was not incorporated in the original publication. The article has been updated to rectify the error.
Ethics approval and consent to participate
: For the cognitive interviewing, participants received verbal and written information about the study. Consent to participate was obtained both verbally and in writing. Information about withdrawing participation at any time without consequences was reiterated at the start of the interviews.Ethical approval was granted by the Regional Ethical Board in Stockholm, Sweden, approval number 2019-02130.
: Not applicable.
: The authors declare that they have no competing interests.