1. Continuous/chronic treatment with opiate/opioid analgesics for 3-6 months prior to enrollment. In addition, patients receiving radiation therapy alone who have taken opiate analgesics from their surgery within 72 hours of the post-surgery/pre-radiation therapy blood draw (at 1-6 weeks prior to the start of radiation therapy) will be removed from the study. Patients receiving chemotherapy and radiation therapy who have taken opiate analgesics from their surgery within 72 hours of the blood draw prior to cycle 1 of chemotherapy will be removed from the study.