The present and thus third phase II study aims to improve the high-dose regimen by adding Zevalin radioimmunotherapy in patients who are not in CR prior to transplant. Data from the last trial show that patients not in CR at this point have a worse outcome (3 year FFS of 63%, vs 85% for CR patients). Monitoring for molecular relapse in the bone marrow will be done, and patients who become PCR positive will be treated with Rituximab in order to evaluate the value of this strategy.