[1] Univ Colorado, Dept Internal Med, Div Cardiol, Anschutz Med Campus, Aurora, CO USA
[2] Univ Colorado, Dept Internal Med, Anschutz Med Campus, Aurora, CO USA
[3] Univ Colorado, Div Cardiothorac Surg, Dept Surg, Anschutz Med Campus, Aurora, CO USA
[4] Univ Colorado, Dept Neurosurg, Anschutz Med Campus, Aurora, CO USA
[5] Univ Innsbruck, Dept Sports Sci, Div Physiol, Innsbruck, Austria
[6] Natl Inst Adv Ind Sci & Technol, Human Informat Res Inst, Tsukuba, Ibaraki, Japan
[7] Ohio State Univ, Dept Neurol, Columbus, OH 43210 USA
[8] Univ Michigan, Dept Internal Med, Div Cardiovasc Med, Ann Arbor, MI 48109 USA