1. The Cardiovascular Institute University of Tennessee Health Science Center Memphis Tennessee
2. Cardiovascular Service The Christ Hospital Cincinnati Ohio
3. Department of Medicine Division of Preventive Medicine University of Alabama Birmingham Birmingham Alabama
4. Division of Cardiology Baylor College of Medicine Houston Texas
5. Department of Epidemiology and Cancer Control St Jude Children's Research Hospital Memphis Tennessee
6. Department of Pediatrics University of Tennessee Health Science Center Memphis Tennessee
7. Department of Oncology St Jude Children's Research Hospital Memphis Tennessee
8. Department of Radiation Physics Division of Radiation Oncology The University of Texas MD Anderson Cancer Center Houston Texas
9. Department of Biostatistics St Jude Children's Research Hospital Memphis Tennessee