Fig. 4

a Example of dermal sample after plasma treatment, stained for γH2AX. Positive nuclei are indicated (arrow head); bar is 50 μm. b Quantification of the relative number of cells (%) positive for γH2AX after plasma treatment of dermal tissue (n=4–5 in duplicate). c Re-epithelialization and d proliferation of keratinocytes in BWM after 2 weeks of culture. Plasma was applied four times in 10 days. Mean values and standard deviation are shown (n=6 for 0 and 120 s, n=4 for 60 s, all in duplicate). Significant differences were not observed