1. From the Department of Pathology, The University of Texas Health Science Center at San Antonio (H.C.M., C.A.M.) and Southwest Foundation for Biomedical Research (H.C.M.), San Antonio, Tex; the Department of Pathology, Louisiana State University Medical Center, New Orleans (A.Z.W., R.E.T., G.T.M., J.P.S.); and the Biomedical Engineering Center, Ohio State University, Columbus (E.E.H.).