Fig. 6.

An addicted smoker (left) more than doubles systemic oxidative stress as shown in the bar chart on the left where the leukocytes from the blood sample taken from the smoker show a significantly higher amount of cells with DNA breaks depicted as comet tails (b) in comparison to the blood sample from an age- and sex-matched healthy control with intact cells (a). From: Mozaffarieh M, Konieczka K, Hauenstein D, Schoetzau A, Flamme J. Half a pack of cigarettes a day more than doubles DNA breaks in circulating leukocytes. Tob Induc Dis. 17;8:14 (2010)