 If you agree to participate in this screening study, your complete medical history including smoking history will be recorded and you will have a physical exam, including measurement of vital signs blood pressure, pulse, temperature, and breathing rate, height, and weight. You will have blood about 2 teaspoons drawn for routine tests. You will also have blood about 1-2 tablespoons drawn to check your blood clotting function, thyroid function, and lipid fat levels. You will have a urine test, a performance status evaluation questions about your ability to perform everyday activities, and an electrocardiogram ECG -- a test that measures the electrical activity of the heart. 