Responding participants will be followed at least every 6 months for the first 36 months (from the end of therapy). After that, you will be followed at least once a year unless the disease gets worse and needs to be re-treated. For the follow-up evaluations, you will have a physical exam, including measurement of vital signs. Blood (about 4 tablespoons) will be drawn for routine tests. Blood (about 4-5 teaspoons) and urine (over 24 hours) will be collected to check the status of your WM. If the x-rays and/or CT scans done at the beginning of the study were positive, you will have repeat x-rays and/or CT scans.