Cell-mediated immunity posttransplant was assessed by measuring lymphocyte populations using immunophenotyping. There were no significant differences between the treatment arms in median counts for total lymphocytes, CD3⁺, CD8⁺, CD19⁺, or CD56⁺ lymphocyte subsets that were consistently observed at the day-100, 6-month, or 1-year visits. There were significant differences between the arms at more than one of the posttransplant visits for the number of CD4⁺ cells and the CD4/CD8 ratio.