Table 1. Tumor incidence rate of wild-type (WT), p16 knock-out (p16-KO), Dmd knock-out (Dmd-KO) and double knock-out (dKO) rats until 11 months old.

Genotype	WT	p16-KO	Dmd-KO	dKO
Number of rats developed tumor (until 11 months)	0/14	0/12	0/13	12/22