1. J. A. Haley Veterans Hospital and the Departments of Internal Medicine and Biochemistry/Molecular Biology (G.B., M.L.S., L.G., R.V.F.), University of South Florida College of Medicine, Tampa, Florida 33612
2. Centro de Biologia Molecular “Severo Ochoa” (J.M.), Universidad Autonoma, Canto Blanco, 28049 Madrid, Spain