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![Environmental aging of the skin: new insights](https://image.oaes.cc/3679293d-5388-4b4e-90be-83d62e309334/3727.fig.2.jpg)
Figure 2. Squamous cell carcinoma multiplicity (number of tumors/mouse) in Skh:1 female mice after topical application of BaP (8 nmol) followed by exposure to ultraviolet A (UVA) (40 kg/m2) three times weekly for 25 weeks. For 5 weeks after treatments were discontinued, tumors were still counted (Wang et al.[1]). (Printed with consent of the authors.). BaP: benzo[a]pyrene