1. Department of Neurology Motala Hospital Motala Sweden
2. Gottfries Clinic Affiliated with Institute of Neuroscience and Physiology The Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
3. Department of Clinical Neuroscience Institute of Neuroscience and Physiology The Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
4. Amsterdam University Medical Center VU University Medical Center Amsterdam The Netherlands