Testing A New Combination of Anti-cancer Immune Therapies, Atezolizumab and CDX-1127 (Varlilumab) With or Without the Addition of a Third Anti-cancer Drug, Cobimetinib, for Advanced-Stage Biliary Tract Cancer

Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York

Roswell Park Cancer Institute, Buffalo

Johns Hopkins University/Sidney Kimmel Cancer Center, Baltimore

University of Virginia Cancer Center, Charlottesville

Wake Forest University Health Sciences, Winston-Salem

Emory University Hospital Midtown, Atlanta

Emory University Hospital/Winship Cancer Institute, Atlanta

Emory Saint Joseph's Hospital, Atlanta

University of Miami Miller School of Medicine-Sylvester Cancer Center, Miami

UM Sylvester Comprehensive Cancer Center at Coral Gables, Coral Gables

UM Sylvester Comprehensive Cancer Center at Kendall, Miami

UM Sylvester Comprehensive Cancer Center at Aventura, Aventura

UM Sylvester Comprehensive Cancer Center at Plantation, Plantation

UM Sylvester Comprehensive Cancer Center at Deerfield Beach, Deerfield Beach

Vanderbilt University/Ingram Cancer Center, Nashville

Ohio State University Comprehensive Cancer Center, Columbus

University of Wisconsin Carbone Cancer Center - University Hospital, Madison

Mayo Clinic in Rochester, Rochester

Northwestern University, Chicago

M D Anderson Cancer Center, Houston

University of Texas Health Science Center at San Antonio, San Antonio

UCHealth University of Colorado Hospital, Aurora

Huntsman Cancer Institute/University of Utah, Salt Lake City

Mayo Clinic Hospital in Arizona, Phoenix

Los Angeles General Medical Center, Los Angeles

USC / Norris Comprehensive Cancer Center, Los Angeles

City of Hope Comprehensive Cancer Center, Duarte

UC Irvine Health/Chao Family Comprehensive Cancer Center, Orange

University of California Davis Comprehensive Cancer Center, Sacramento