 Clinic visits will occur every 2 weeks during the first 4 weeks and every 4 weeks from then on. At each clinic visit, you will be asked questions about your medical history and about any medications you are currently taking or have taken in the past. You will have a complete physical exam and your heart rate, temperature, breathing rate, blood pressure, height, and weight will be measured. You will be asked about your ability to perform every day activities. Blood samples about 1 teaspoons for routine tests will be collected every 2 weeks for the first 8 weeks. After that, blood samples about 2 teaspoons will be collected every 4 weeks. CT or MRI scans will be performed every 12 weeks. 