- Ornithine decarboxylase is a target for chemoprevention of basal and squamous cell carcinomas in Ptch1+/- mice. Tang, X., Kim, A.L., Feith, D.J., Pegg, A.E., Russo, J., Zhang, H., Aszterbaum, M., Kopelovich, L., Epstein, E.H., Bickers, D.R., Athar, M. J. Clin. Invest. (2004)