1. From Exponent (M.T.H., J.K.S.), Alexandria, Va; Novartis Pharma AG (Z.M.K.), Basel, Switzerland; University of Lausanne (M.B.), Lausanne, Switzerland; Caro Research (J.J.C.), Concord, Mass; Yale University (J.C.), New Haven, Conn; Novartis Pharmaceuticals Corporation (W.L.D.), East Hanover, NJ; University of Massachusetts Medical School (J.G.), Worcester, Mass; and Harvard University (N.K.H.), Boston, Mass.