1. From the University of Alabama at Birmingham (M.I.A., I.A., A.A.), Birmingham, Ala; New York Medical College (W.S.A.), Valhalla, New York; University of California (M.H.C.), San Diego, La Jolla, Calif; Case Western Reserve University (T.E.L.), Cleveland, Ohio; Cardiopulmonary Research Science and Technology Institute (E.J.E.), Dallas, Tex; Veterans Affairs Medical Center (A.A.), Birmingham, Ala.