- Patients are eligible if they received adjuvant treatment after surgical resection with single-agent gemcitabine or gemcitabine/capecitabine or 5-fluorouracil/leucovorin that was completed >12 months before enrollment. Similarly, adjuvant radiation +/- chemosensitization with 5-fluorouracil, capecitabine, or gemcitabine is allowed if completed >12 months before enrollment.