1. John Rankin Laboratory of Pulmonary Medicine; Department of Pediatrics; Critical Care Division; University of Wisconsin School of Medicine and Public Health; Madison Wisconsin
2. Department of Kinesiology; University of Wisconsin-Madison; Madison Wisconsin
3. Department of Health and Human Physiology; University of Iowa; Iowa City Iowa
4. Adult Echocardiography Laboratory; University of Wisconsin Hospitals and Clinics; Madison Wisconsin
5. Division of Pediatric Cardiology; University of Wisconsin School of Medicine and Public Health; Madison Wisconsin
6. Department of Biomedical Engineering; University of Wisconsin-Madison; Iowa City Iowa
7. Stead Family Department of Pediatrics; University of Iowa; Iowa City Iowa
8. Holden Comprehensive Cancer Center; University of Iowa; Iowa City Iowa