Figure 4

Effects of smoking and 14 days smoking cessation (a) TNF-α: tumour necrosis factor-alpha; (b) IL-2: interleukin-2; (c) IL-4: interleukin-4; (d) IL-6: interleukin-6; (e) IL-10: Interleukin-10; (f) IL-12p70: interleukin-12p70; data are presented as mean ± SD; *: significantly different from Non-smokers at p < 0.05; α: significantly different from smokers at p < 0.05.