1. Department of Cardiothoracic Anesthesia, The Heart Center (A.G.V., F.H., H.B.R., J.C.N.)
2. Department of Anesthesia, Center of Head and Orthopedics (L.S.R.)
3. Department of Radiology, Diagnostic Center (A.L., C.T.)
4. Neurobiological Research Unit, The Neuro Center (O.B.P.)
5. Rigshospitalet, and Department of Biostatistics (T.L.), University of Copenhagen, Denmark.
6. Department of Cardiothoracic Surgery, The Heart Center (P.S.O.)