Before the study begins, you will have a physical exam, including blood (about 1-2 tablespoons) and urine tests. Women who are able to have children must have a negative blood pregnancy test. Bone marrow samples will be taken. To collect a bone marrow sample, an area of the hip or chest bone is numbed with anaesthetic and a small amount of bone marrow is withdrawn through a large needle. You will have a chest x-ray, CT scans, an EKG (test to measure the electrical activity of the heart), and tests of lung function.