1. From the University of Texas Southwestern Medical Center, Dallas, TX (D.W.M., Q.F., M.H.D., D.M.M., B.T.B., J.L.H., N.F., S.S., B.D.L.); and the Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX (Q.F., M.D.P., J.L.H., N.F., S.S., B.D.L.).