You will be shown how to do spirometry (a lung test that measures how much and how fast air moves out of the lungs) to monitor the safety of your therapy. You will be asked to do this after each treatment cycle, for the first 2 cycles. If your dose of L9-NC is increased to twice a day, you will also be asked to do spirometry after the second dose of the day during Cycle 3. For future cycles, you will be asked to do spirometry after the last dose of L9-NC, on the first day of each week of treatment. The results of spirometry will need to be sent to M.D. Anderson by telephone, after each test. The results will be sent electronically. They will be reviewed every day after they are received, and you will be contacted if there are abnormal results. Your doctor may also perform additional spirometry as needed.