Funding for this research was provided by:
Region of Southern Denmark
Received: 2 June 2020
Accepted: 26 October 2020
First Online: 3 November 2020
Ethics approval and consent to participate
: In accordance with the guidelines from the Danish National Ethics Committee, the study was not subject to notification [CitationRef removed]. Health care professionals performing the validation of the CFS-DK gave their written consent to participate. The study was approved by the Danish Data Protection Agency (rec. nr. 20/16898).
: No images, details or videos in this study relate to an individual person. Pictures accompanying case vignettes were licenced from Colourbox.dk.
: The authors declare that they have no competing interests.