Sorafenib in Treating Patients With Malignant Gastrointestinal Stromal Tumor That Progressed During or After Previous Treatment With Imatinib Mesylate and Sunitinib Malate

Memorial Sloan Kettering Cancer Center, New York

University of Chicago Comprehensive Cancer Center, Chicago

Decatur Memorial Hospital, Decatur

Central Illinois Hematology Oncology Center, Springfield

City of Hope Comprehensive Cancer Center, Duarte

University of California Davis Comprehensive Cancer Center, Sacramento