1. Department of Anesthesiology, H.U.B.—Hôpital Erasme, Université Libre de Bruxelles, 1070 Brussels, Belgium
2. Department of Cardiology, H.U.B.—Hôpital Erasme, Université Libre de Bruxelles, 1070 Brussels, Belgium
3. School of Medicine, University of California, La Jolla, San Diego, CA 92093, USA
4. EW Data Analysis, 1180 Brussels, Belgium