The International Epidemiology Institute is a unique highly experienced biomedical research organization founded in 1994 by senior scientists from the National Cancer Institute, U.S.A. IEI provides state-of-the-science expertise for addressing the complex biomedical issues that confront both the public and private sectors, universities, and other institutions in today's rapidly changing world. IEI's goal is to provide experienced scientific investigators and approaches in the evaluation and resolution of complex human health problems worldwide. IEI staff possesses extensive and unique experience in epidemiologic research, having initiated and brought to fruition collaborative health studies in the United States, western and central Europe, Japan, Scandinavia, and China. The Institute offers this international experience together with a full range of epidemiologic activities from the design and execution of investigations to the evaluation and interpretation of study results, in order to understand the etiology and means of prevention of human illnesses.