1. Department of Neurology; Karolinska University Hospital; Sweden
2. Department of Medicine; Solna, Center for Molecular Medicine, L8:03, Karolinska Institute; 171 76; Stockholm; Sweden
3. Department of Neuroradiology; Karolinska University Hospital; Sweden
4. Department of Neuropathology; Karolinska University Hospital; Sweden
5. Nurses Supervision and Research, AB; Celsiusgatan 4, 112 30; Stockholm