1. College of Nursing and Health Innovation, University of Texas at Arlington (M.J.H.)
2. Department of Prevention, Rehabilitation and Sports Medicine, Technische Universität München, Klinikum rechts der Isar, Germany (M.H.)
3. German Center for Cardiovascular Research, partner site Munich Heart Alliance, Germany (M.H.)
4. Cardiovascular Performance Program, Massachusetts General Hospital, Boston (A.B.)