Lower or Standard Dose Regorafenib in Treating Patients With Refractory Metastatic Colorectal Cancer

Hematology Oncology Associates of Central New York-East Syracuse, East Syracuse

Roswell Park Cancer Institute, Buffalo

Geisinger Medical Center, Danville

Wake Forest University Health Sciences, Winston-Salem

Wellmont Medical Associates Oncology and Hematology-Kingsport, Kingsport

Ohio State University Comprehensive Cancer Center, Columbus

Toledo Clinic Cancer Centers-Toledo, Toledo

Northern Indiana Cancer Research Consortium, South Bend

Siouxland Regional Cancer Center, Sioux City

Saint Vincent Hospital Cancer Center Green Bay, Green Bay

Marshfield Clinic, Marshfield

Metro Minnesota Community Oncology Research Consortium, Saint Louis Park

Mayo Clinic, Rochester

Illinois CancerCare-Peoria, Peoria

Washington University School of Medicine, St Louis

Missouri Valley Cancer Consortium, Omaha

University of Nebraska Medical Center, Omaha

Mayo Clinic Hospital, Phoenix

Mayo Clinic in Arizona, Scottsdale

USC / Norris Comprehensive Cancer Center, Los Angeles

University of Washington Medical Center, Seattle

Dana-Farber Cancer Institute, Boston