During the last week of radiotherapy, and at 1, 3, and 6 months after the end of radiation treatment, all participants will be asked to fill out a packet of questionnaires (similar to those taken at the first visit). It should take about 45 minutes to complete all of the questionnaires. If it is not convenient for you to come to M. D. Anderson, a researcher can visit you at home to help with the questionnaires. You will then be asked to complete another daily sleep diary for another 7 days. During this time, you will wear an actigraph watch 24 hours a day for 7 days a week to collect the same data as before. During this time, you will have an ECG and your breathing rate will be measured.