1. Departments of Molecular Oncology (E.H.F., M.B.), Genentech Inc., South San Francisco, California 94080
2. Pathology (S.G., D.M.F.), Genentech Inc., South San Francisco, California 94080
3. Physiology (C.Z., G.I., H.S., J.H., S.B., J.R., R.A.D.C., L.P.-B., M.E.G.), Genentech Inc., South San Francisco, California 94080
4. Department of Physiology (G.F.W.), Faculty of Medicine and Dentistry, The University of Western Ontario, London, Ontario N6A 5C1, Canada
5. Safety Assessment (R.E.), Genentech Inc., South San Francisco, California 94080