Funding for this research was provided by:
Kavli Trust (www.kavlifondet.no) The Research Council of Norway
Text and Data Mining valid from 2020-03-24
Received: 2 September 2019
Accepted: 3 March 2020
First Online: 24 March 2020
: A.L., Ø.F., E.S., S.F., D.S., O.M., T.E., B.L. and M.V. all declare that they have no conflict of interest. O.S. is member of EMECC - European M.E. Clinicians Council; otherwise he has no conflict of interest.