Mice deficient in tumor necrosis factor-alpha are resistant to skin carcinogenesis. - Moore,R.J.; Owens,D.M.; Stamp,G.; Arnott,C.; Burke,F.; East,N.; Holdsworth,H.; Turner,L.; Rollins,B.; Pasparakis,M.; Kollias,G.; Balkwill,F. (Nat Med, 1999)