Fig. 2From: Lower hypoxic ventilatory response in smokers compared to non-smokers during abstinence from cigarettesHypoxic ventilatory response before and after re-exposure to cigarette smoke. Individual (small symbols) and mean ± S.E.M. (big symbols) values of HVR before and after smoking of one cigarette in a subgroup (n = 14) of 12-h-abstinent smokers. The increase in HVR through smoking was highly significant (Wilcoxon-test)Back to article page