1. The Lundquist Institute at Harbor-UCLA Medical Center, David Geffen School of Medicine at UCLA, Torrance, California, USA
2. Department of Medicine, Duke University Medical Center/Duke Cancer Institute, Durham, North Carolina, USA
3. Division of Medical Oncology, University of Colorado, Aurora, Colorado, USA
4. Department of Otorhinolaryngology: Head and Neck Surgery, Abramson Cancer Center of the University of Pennsylvania, Philadelphia, Pennsylvania, USA
5. Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
6. Winship Cancer Institute of Emory University, Atlanta, Georgia, USA
7. Bayer HealthCare Pharmaceuticals, Whippany, New Jersey, USA
8. Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan, USA