Received: 15 July 2021
Accepted: 23 September 2021
First Online: 8 October 2021
: Ethics approval given by the Norwegian Regional Ethics Committee, South-East, approval number 2010/2994. All EM-patients signed an informed consent to participate in the original trial [CitationRef removed], including having their skin biopsies and serum samples analyzed abroad.
: Not applicable.
: The authors declare that they have no competing interests.