Fig. 2From: Influence of three BALB/c substrain backgrounds on the skin tumor induction efficacy to DMBA and TPA cotreatmentTumor growth and incidence in three BALB/c substrains after DMBA and TPA cotreatment. a Morphological images of the tumor developed on the back skin of three BALB/c substrains treated with DMBA and TPA at 22 weeks. b Tumor incidence calculated as described in Materials and MethodBack to article page