Testing the Use of Investigational Drugs Atezolizumab and/or Bevacizumab With or Without Standard Chemotherapy in the Second-Line Treatment of Advanced-Stage Head and Neck Cancers
National Cancer Institute (NCI)
National Cancer Institute (NCI)
National Institutes of Health Clinical Center (CC)
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Mayo Clinic
Mayo Clinic
McGill University Health Centre/Research Institute of the McGill University Health Centre
George Washington University
University of Jena
The Second People's Hospital of Sichuan