Patients receive 1 of 3 chemotherapy regimens at the discretion of the primary oncologist, including docetaxel intravenously (IV) on day 1, pemetrexed disodium IV on day 1, or gemcitabine hydrochloride IV on days 1 and 8. Treatment repeats every 3 weeks for 2 courses in the absence of disease progression or unacceptable toxicity. After course 2, patients may continue treatment off-study at the discretion of the treating physician.