1. Department of Neuroscience and Pharmacology; University of Copenhagen; Copenhagen Denmark
2. Department of Clinical Physiology, Nuclear Medicine and PET; The Diagnostic Centre, Rigshospitalet; Copenhagen Denmark
3. Section for Transfusion Medicine; Capital Region Blood Bank; The Diagnostic Centre, Rigshospitalet; Copenhagen Denmark
4. Department of Surgery; University of Texas Health Medical School; Houston Texas
5. Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
6. Department of Neuroanaesthesia; The Neuroscience Centre, Rigshospitalet; Copenhagen Denmark