1. From the Division of Cardiology, Department of Internal Medicine (W.K.C., A.V.A.), University of Colorado, Anschutz Medical Campus, Aurora
2. Department of Internal Medicine (T. Tran), University of Colorado, Anschutz Medical Campus, Aurora
3. Division of Cardiothoracic Surgery, Department of Surgery (J.D.P.), University of Colorado, Anschutz Medical Campus, Aurora
4. Department of Neurosurgery (L.C.), University of Colorado, Anschutz Medical Campus, Aurora
5. Division of Physiology, Department of Sports Science, University of Innsbruck, Austria (J.L.)
6. Human Informatics Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan (T. Tarumi)
7. Department of Neurology, Ohio State University, Columbus (C.L.C.)
8. Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor (K.A.).