Nivolumab With or Without Ipilimumab in Treating Patients With Refractory Metastatic Anal Canal Cancer
National Cancer Institute (NCI)
National Cancer Institute (NCI)
AIDS Malignancy Consortium
Eastern Cooperative Oncology Group
Duke University
Instituto do Cancer do Estado de São Paulo
AHS Cancer Control Alberta
AIDS Malignancy Consortium
Centre Hospitalier Universitaire de Besancon
University of Sao Paulo
Sun Yat-sen University
M.D. Anderson Cancer Center
Eastern Cooperative Oncology Group
Eastern Cooperative Oncology Group
Centre Hospitalier Universitaire de Besancon
Radiation Therapy Oncology Group
AHS Cancer Control Alberta
Instituto do Cancer do Estado de São Paulo