1. From the University of Pittsburgh (L.H.K., D.G.I., O.L.L.), Pittsburgh, Pa; the University of Washington (A.L.F., C.M.), Seattle, Wash; Johns Hopkins University (M.C.C.), Baltimore, Md; the University of Virginia (S.T.D.), Charlottesville, Va; and Wake Forest University (G.L.B., C.D.F.), Winston-Salem, NC.