1. Departments of Medicine (J.L., R.N., S.S.P., M.C.O., B.D.G., M.O.T.), University of Virginia, Charlottesville, Virginia 22908
2. Department of Chemistry (C.E.P., H.M.G.), University of Virginia, Charlottesville, Virginia 22908
3. Department of Pharmacology (M.L.J., P.V.), University of Virginia, Charlottesville, Virginia 22908
4. Department of Bristol-Myers Squibb Pharmaceutical Research Institute (D.A.G.), Princeton, New Jersey 08543
5. Department of Merck Research Laboratories (A.D.H.), Rahway, New Jersey 07065
6. Department of Lilly Research Laboratories (D.R.W.), Indianapolis, Indiana 46285