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. 2016 Nov 24;16:159. doi: 10.1186/s12890-016-0323-0

Fig. 2.

Fig. 2

Hypoxic 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)