This survey study is intended to estimate the prevalence of use of CAM in patients who are currently being treated in the Phase I Clinical Trials Program at University of Texas MD Anderson Cancer Center. The survey includes questions about socioeconomic characteristics (age, gender, race, income, and education level), patients' diagnosis and patients' perceptions about their prognosis, physicians' information and permission for patients' use of CAM, patients' use of CAM (yes or no), decision-making (purpose of CAM use), resources and types of CAM.