Figure 2From: Heme oxygenase-1 prevents smoke induced B-cell infiltrates: a role for regulatory T cells?Emphysema development. Mean linear intercept (LMI) after long term smoke exposure and protoporphyrin treatment. Smoke groups are represented by closed symbols and sham smoke groups by open symbols. * indicates a significant effect of smoke exposure (p < 0.05). There were no interactions and no effects of CoPP or SnPP treatment.Back to article page