Dr. Ralph Moss has contributed extensively to literature that deals with alternative approaches for the treatment of cancer. His professional colleagues, both in mainstream medicine as well as complementary medicine, regard him as one of the foremost authorities in this field. His work is widely published and I have drawn upon it to evaluate the more controversial aspects of cancer treatment. Dr. Moss has also provided valuable leadership in the ongoing search for more holistic treatments for cancer. All his colleagues, including me, hold him in high professional regard.