I have 26 years of experience, and specialize in the field of life sciences with specific knowledge in the areas of toxicology, microbiology, biochemistry, analytical chemistry, risk assessment, infectious diseases, immunology and allergic phenomena. I have published on such topics as mechanisms of toxicity, the biology and chemistry of oxygen, mechanisms of disease production, analytical biochemistry, free radical mechanism of toxicity, and cell and molecular biochemistry. I have testified 20 times on topics such as pesticide risk assessment, toxic effects of various chemicals, physiological effects of alcohol and drugs, exposure to benzene and other solvents, and cause and effect determination.