Some of what medicine says is true, and some is not true—the problem is practitioners do not necessarily know which is true and which is not. Medicine is overwhelmed by knowledge, while starving for ideas on how to apply the knowledge to benefit patients. Medical practitioners are not routinely exposed to knowledge in other specialties. Research is done by each individual specialty, and researchers may not recognize the importance and significance of findings that relate to different specialties. Research bias against infectious causes and in favor of genetic explanations have hampered discovery, in 90% of chronic diseases.