1. From the Division of Clinical Pharmacology, Department of Medicine (S.A.H., J.R.W., C.A.S., S.J.K., N.J.B.)
2. Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (S.A.H.)
3. Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Pennsylvania, Philadelphia (J.R.W.)
4. Department of Biostatistics (C.Y., H.N.)
5. Service de Pharmacologie Clinique, Laboratoire des Catécholamines et Peptides, University Hospital of Lausanne, Switzerland (E.G., P.E.).
6. Department of Anesthesiology (F.T.B.), Vanderbilt University Medical Center, Nashville, TN