Indeed, while conflicting animal tests have often delayed and hampered advances in the war on cancer, they have never produced a single substantial advance either in the prevention or treatment of human cancer. Among experienced public health officials, it is well known that you can 'prove' anything with animal studies. This is because there are so many different animal model systems and each system gives different results.”
~Dr. Irwin D. Bross, Director of Biostatistics, Roswell Park Memorial Institute for Cancer Research