Nivolumab With or Without Ipilimumab in Treating Patients With Refractory Metastatic Anal Canal Cancer
National Cancer Institute (NCI)
National Cancer Institute (NCI)
M.D. Anderson Cancer Center
National Cancer Institute (NCI)
National Cancer Institute (NCI)
Academic and Community Cancer Research United
M.D. Anderson Cancer Center
Jonsson Comprehensive Cancer Center
National Cancer Institute (NCI)