For lung cancer patients who are post-chemotherapy, your symptoms will be monitored weekly for 3 months after therapy using the interactive voice response telephone system. For esophageal, gastric, colorectal, and anal patients who are post-therapy, your symptoms will be monitored weekly for 6 weeks after therapy using the interactive voice response telephone system. About 30 days after chemoradiation, you will have 2½ tablespoons of blood drawn at your regularly scheduled clinic visit. If you are not scheduled for a 3 month clinic visit, we will contact your local physician for blood lab results.