1. Departments of Medicine (L.Y., M.J., P.L.M.D.), University of Texas Health Science Center at San Antonio, Texas 78229
2. Centro de Investigaciones Endocrinologicas (M.B.), C1425EFD Buenos Aires, Argentina
3. Department of Surgery (B.N.), Medical University of Vienna, A-1090 Vienna, Austria
4. Institute of Pathophysiology and Immunology (R.P.), Medical University of Graz, A-8036 Graz, Austria
5. Cellular and Structural Biology (P.L.M.D.), University of Texas Health Science Center at San Antonio, Texas 78229
6. Cancer Therapy and Research Center (P.L.M.D.), University of Texas Health Science Center at San Antonio, Texas 78229