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Timothy Wilcosky, PhD, senior epidemiologist, has a strong background in study design, statistical methods, and data analysis. His epidemiology experience spans more than 25 years and covers a variety of research areas. In addition to his general methodological skills, he has substantive expertise in cancer, cardiovascular disease, and other chronic diseases; tuberculosis and HIV infection; biological markers; occupational and environmental epidemiology; and clinical trials. While on the faculty in the Department of Epidemiology at the University of North Carolina at Chapel Hill School of Public Health, he was an editor and contributor for the first book on biological markers written for epidemiologists. He joined RTI in 1990, where he has led or worked on numerous diverse projects. His published articles cover a variety of methodological and substantive topics. | 