Application of study inclusion criteria to select matched cohort of eligible IVIg users and nonusers diagnosed with CLL or MM. *In identifying potential matches for an IVIg user, all exclusion criteria applied to IVIg users were similarly applied to the pool of potential nonuser matches on the IVIg user’s treatment initiation date (index date). **Counts for these 3 exclusion criteria were combined due to SEER-Medicare restrictions on publishing small cell counts.