1. Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
2. Department of Neurology, ME Neurology, Karolinska University Hospital, Stockholm, Sweden
3. Department of Clinical Sciences, Neuroscience, Faculty of Medicine, Umeå University, Umeå, Sweden
4. Unit of Integrative Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
5. Methodology and Statistics Unit, Institute of Psychology, Leiden University, Leiden, The Netherlands
6. Neuropsychology, Department of Neurology, Ulm University, Ulm, Germany