- Patients must not have more than one prior chemotherapy regimen for recurrent/metastatic disease. Patients with initial locally advanced but non-metastatic disease are allowed to have one prior chemotherapy regimen as part of the primary curative therapy. All chemotherapy must be completed 4 weeks prior to registration. Any number of prior biologic therapies (e.g. chimeric antibodies or kinase inhibitors) is permitted as part of the chemotherapy regimen.