1. Clinical Neurochemistry Laboratory, Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry; Sahlgrenska Academy at University of Gothenburg; Mölndal; Sweden
2. Department of Clinical Studies, School of Veterinary Medicine; University of Pennsylvania; Philadelphia; PA; USA
3. Department of Clinical Chemistry and Transfusion Medicine, Institute of Biomedicine; University of Gothenburg; Gothenburg; Sweden