1. Clinical Memory Research Unit, Department of Clinical Sciences, Faculty of Medicine, Lund University, Lund, Sweden
2. Memory Clinic, Skåne University Hospital, Scania, Sweden
3. Department of Neurology, Skåne University Hospital, Scania, Sweden
4. Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
5. Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Möndal, Sweden
6. Department of Molecular Neuroscience, University College London Institute of Neurology, Queen Square, London, England