1. From the Department of Pediatrics, University of Cincinnati, Cincinnati Children’s Hospital Medical Center (M.H., R.K., T.F.K., T.E.H., J.D.M.) and the Departments of Molecular Genetics (M.H.) and Medicine, University of Cincinnati (H.H., G.W.D.), Cincinnati, Ohio; Procter and Gamble Pharmaceuticals (A.N.C), Cincinnati, Ohio; and the Center for Translational Medicine, Jefferson Medical College (S.T.P., M.C.K., W.J.K), Philadelphia, Pa.