1. 1Memorial Sloan Kettering Cancer Center, New York, New York.
2. 2Hospital Clinico Universitario of Valencia, Biomedical Research Institute INCLIVA, CIBERONC, Valencia, Spain.
3. 3Institut Català d'Oncologia, L'Hospitalet de Llobregat, Barcelona, Spain.
4. 4Genentech, Inc., South San Francisco, California.
5. 5Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, Massachusetts.