Tijuana, Mexico. An independent researcher, Hulda R. Clark, Ph.D., N.D., is finding the building blocks of tumors. Dr. Clark sees hundreds of cancer sufferers each month, and from them the patterns start to become apparent.According to Dr. Clark: “Each little tumor is a mass of tangled growth. In every one I find bacteria, making the tangled mass grow. The bacteria produce growth factors, probably for their own benefit, but our cells are also forced to multiply.