Effect of inhaling peptide 861-874 on T cells' proliferative response to peptide 861-874 and band 3. Splenic T cells were obtained from NZB mice that had inhaled saline or peptide 861-874 on days 14, 21, and 28 after treatment and were stimulated with peptide 861-874 (A) or band 3 (B). Each point represents the stimulation index of the peak responses (^*P < .01, ^**P < .001, Mann-Whitney U test).