1 Department of Social Sciences, University of Stavanger, Stavanger, Norway; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
2 Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Osher Center for Integrative Health, ME Neuroradiologi, Karolinska Universitetssjukhuset, Stockholm, Sweden; Department of Psychology, Stockholm University, Stockholm, Sweden.