1. Cooper Clinic, Dallas, TX (N.B.R.).
2. Cooper Institute, Dallas, TX (L.F.D., D.L., C.E.B., B.L.W., L.W.G.).
3. Department of Clinical Cancer Prevention, University of Texas MD Anderson Cancer Center, Houston (S.C.G.).
4. Department of Medicine, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas (A.K., B.D.L.)
5. Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas (B.D.L.).