I have 15 years of experience, and specialize in the field of toxicology, epidemiology, and risk assessment with specific knowledge in the areas of carcinogenesis, exposure assessment, dose-response analysis, product safety and risk communication. I have published on such topics as toxicology, epidemiology, weight-of-evidence analyses, risk assessment, and chemicals such as nickel, PBDE, bisphenol A, naphthalene, methyl tert-butyl ether (MBTE), and catechol-O-methyltransferase. I have testified 29 times on topics such as asbestos and lung cancer and mesothelioma risk, National Ambient Air Quality Standards for ozone, particulate matter, nitrogen dioxide, and sulfur dioxide, styrene and bisphenol A.