Figure 1

(a) Animal study design. 1, Exposure to environmental cigarette smoke (ECS) (N = 5). 2, Acute treatment with NNK and LPS (N = 3). 3, Subchronic treatment with NNK, LPS, and NNK/LPS (N = 3)⁸. 4, tumor study, (N = 3, tumors were pooled from 3 mice for each measurement).