Isotretinoin, Interferon Alfa, and Vitamin E in Treating Patients With Stage III or Stage IV Head and Neck Cancer
Eastern Cooperative Oncology Group
Eastern Cooperative Oncology Group
University of Jordan
Canadian Cancer Trials Group
SWOG Cancer Research Network
Alliance for Clinical Trials in Oncology
Alliance for Clinical Trials in Oncology
SWOG Cancer Research Network
New Mexico Cancer Research Alliance
National Cancer Institute (NCI)
National Cancer Institute (NCI)
Memorial Sloan Kettering Cancer Center
Brigham and Women's Hospital
M.D. Anderson Cancer Center
Institut National de la Santé Et de la Recherche Médicale, France