Kaplan-Meier survival curves of mice bearing disseminated lymphoma. Groups of 10 mice bearing disseminated lymphoma after IV Granta-519^Luc (MCL) injections 6 days before treatment. Mice in the treatment groups were treated with 7.5 or 15 µCi of radiation via 1F5-B10 (anti-CD20), HB8181-B10 (nonbinding control), or 1F5-B10 (unlabeled mAb control). All animals received stem cell rescue either 2 days after the radiation dose (1F5-B10 or HB8181-B10 groups) or at the same time point without radiation (BMT control group).