Lometrexol Plus Folic Acid in Treating Patients With Stage IIIB or Stage IV Non-Small Cell Lung Cancer

US Oncology - Albany Regional Cancer Center, Albany

Cancer Centers of Florida (U.S. Oncology), Orlando

Tyler Cancer Center, Tyler

U.S. Oncology Research Inc., Houston

Cancer Care Northwest, Spokane

UCSF Cancer Center and Cancer Research Institute, San Francisco

Louisiana State University School of Medicine, New Orleans