ABRAHAM SILVERS provides statistical consulting and support in the design, database management, and analysis of health studies and clinical trials. He has consulted for a number of national and international pharmaceutical and biotech companies to address their need to meet [FDA](/authors/OL322898A "Author: Food & Drug Administration") technical requirements in the areas of drugs, biologics, and devices. Previously, Silvers was associate professor of Mathematics at [California State University](/publishers/California_State_University "Publisher"), Los Angeles. He was a Special Fellow at Stanford Medical School and director of statistics for the Stanford Heart Discase Prevention Program. He has served at the [Mayo Clinic](/publishers/Mayo_Clinic "Publisher") as a consultant and as director of statistical and epidemiological research for the Comprehensive Cancer Center. At [Baylor College](/publishers/Baylor_College "Publisher") he was associate professor of medicine and senior statistician at the only National Heart Research and Demonstration Center sponsored by the [National Institutes of Health](/authors/OL155306A "Author") (NIH). He has also served as professor of statistics at the University of Texas School of Public Health and at the University of California, San Francisco, where he developed and directed the Biostatistics Cancer Clinical Trial Group of the Cancer Center. Silvers led an NIH team in developing an expert system for statistics as part of a computer resource for molecular biology research called Prophet. In addition, he has be an advisor for many institutes of NIH, for the World Health Organization, and for the Environmental Protection Agency. Author of more than a hundred papers and book chapters, Silvers was elected a Fellow of the American Statistical Association (ASA) in 1988 for his contributions to clinical trial methodology. In 1993 he received the distinguished medal in statistics from the ASA.—Stanford University Press