I have 30 years of experience and specialize in the field of biological chemistry with specific knowledge of pharmacology, toxicology and laboratory test procedures. I have published on such topics as bronchiolitis obliterans and popcorn works, silicone antibodies in breast implant patients and herbicide poisoning from mislabeled product. I have testified 75 times on topics such as chemical exposures, biological basis for clinical diagnosis, and scientific method and valid methods issues.