Nivolumab With or Without Ipilimumab in Treating Patients With Refractory Metastatic Anal Canal Cancer

Roswell Park Cancer Institute, Buffalo

University of Pittsburgh Cancer Institute (UPCI), Pittsburgh

MedStar Georgetown University Hospital, Washington D.C.

Virginia Commonwealth University/Massey Cancer Center, Richmond

Duke University Medical Center, Durham

Vanderbilt Breast Center at One Hundred Oaks, Nashville

Vanderbilt University/Ingram Cancer Center, Nashville

Ohio State University Comprehensive Cancer Center, Columbus

University of Michigan Comprehensive Cancer Center, Ann Arbor

Wayne State University/Karmanos Cancer Institute, Detroit

Weisberg Cancer Treatment Center, Farmington Hills

University of Wisconsin Carbone Cancer Center - University Hospital, Madison

UC Comprehensive Cancer Center at Silver Cross, New Lenox

University of Chicago Medicine-Orland Park, Orland Park

Northwestern University, Chicago

University of Chicago Comprehensive Cancer Center, Chicago

Decatur Memorial Hospital, Decatur

Southern Illinois University School of Medicine, Springfield

Washington University School of Medicine, St Louis

Siteman Cancer Center-South County, St Louis

Siteman Cancer Center at Christian Hospital, St Louis

Siteman Cancer Center at West County Hospital, Creve Coeur

Siteman Cancer Center at Saint Peters Hospital, City of Saint Peters

University of Kansas Cancer Center - Lee's Summit, Lee's Summit

University of Kansas Cancer Center at North Kansas City Hospital, North Kansas City

University of Kansas Cancer Center - North, Kansas City

University of Kansas Cancer Center, Kansas City

University of Kansas Clinical Research Center, Fairway

University of Kansas Hospital-Westwood Cancer Center, Westwood

University of Kansas Cancer Center-Overland Park, Overland Park

University of Kansas Hospital-Indian Creek Campus, Overland Park

Nebraska Medicine-Village Pointe, Omaha

Nebraska Medicine-Bellevue, Bellevue

University of Nebraska Medical Center, Omaha

Parkland Memorial Hospital, Dallas

UT Southwestern/Simmons Cancer Center-Dallas, Dallas

UT Southwestern/Simmons Cancer Center-Fort Worth, Fort Worth

M D Anderson Cancer Center, Houston

UCHealth University of Colorado Hospital, Aurora

Los Angeles General Medical Center, Los Angeles

USC / Norris Comprehensive Cancer Center, Los Angeles

University of California Davis Comprehensive Cancer Center, Sacramento

Smilow Cancer Hospital-Derby Care Center, Derby

Smilow Cancer Hospital Care Center-Fairfield, Fairfield

Smilow Cancer Hospital Care Center - Guilford, Guilford

Smilow Cancer Hospital Care Center at Saint Francis, Hartford

Smilow Cancer Center/Yale-New Haven Hospital, New Haven

Yale University, New Haven

Yale-New Haven Hospital North Haven Medical Center, North Haven

Smilow Cancer Hospital-Torrington Care Center, Torrington

Smilow Cancer Hospital Care Center-Trumbull, Trumbull

Smilow Cancer Hospital-Waterbury Care Center, Waterbury

Smilow Cancer Hospital Care Center - Waterford, Waterford

Rutgers Cancer Institute of New Jersey, New Brunswick

Penn State Milton S Hershey Medical Center, Hershey

University Health Network-Princess Margaret Hospital, Toronto