I have 30 years of experience, and specialize in the field of toxicology with specific knowledge in the areas of tobacco related disease, endocrine disruption and toxin metabolism. I have published on such topics as metal toxicity and toxicokinetics, genetic toxicology and marine ecotoxicology and metabolism of oil and polynuclear aromatic hydrocarbons (PAHs). I have testified on carcinogenicity of environmental tobacco smoke.