1. Department of Clinical Chemistry and Transfusion Medicine
2. Department of Clinical Biochemistry, AKH, Aarhus University Hospital, DK 8000 Aarhus C, Denmark
3. Institute of Clinical Neuroscience, Psychiatry Section, and
4. Neuropsychiatric Clinic, Malmö University Hospital, S-205 02 Malmö, Sweden
5. Institute of Clinical Neuroscience, Department of Experimental Neuroscience, Sahlgrenska University Hospital, Göteborg University, S-413 45 Gothenburg, Sweden