1. From INSERM U-698 and Denis Diderot University (P.A.), Paris, France; the University of Texas Health Science Center (O.B.), San Antonio; Duke University (L.B.G.), Durham, North Carolina; Vanderbilt University (A.C.), Nashville, Tenn; University of Copenhagen (H.S.), Denmark; University of Heidelberg (M.G.H.), Mannheim, Germany; Rho Inc (S.G.), Newton, Mass; Pfizer Inc (A.E.R., L.S.), New York; University of San Diego (J.A.Z.), Calif; and Rosalind Franklin University (K.M.A.W.), Chicago, Ill.