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advisory bodies to the Utah State Health Department, including one on the development and administration of public immunization policy.

MARY LUZ COADY is Director of the Department of Pediatrics at Bryn Mawr Hospital, Bryn Mawr, Pennsylvania; Clinical Instructor in Pediatrics at the Temple University School of Medicine, Philadelphia; and a board-certified pediatrician in private practice in Bryn Mawr, Pennsylvania. Dr. Coady received an M.D. from the Women's Medical College of Pennsylvania and completed residencies in pediatrics at Children's Hospital of San Francisco and St. Christopher's Hospital for Children in Philadelphia. She is a fellow of the American Academy of Pediatrics and a member of the Pennsylvania Medical Society.

LINDA D. COWAN is Associate Professor in the Department of Biostatistics and Epidemiology, College of Public Health, at the University of Oklahoma, where she has been a faculty member since 1983. Dr. Cowan received her Ph.D. degree in epidemiology in 1979 from The Johns Hopkins University School of Hygiene and Public Health. After completing her degree, she was a postdoctoral fellow in neuroepidemiology at Children's Hospital, Boston, and the Harvard School of Public Health. From 1980 to 1983, Dr. Cowan was Assistant Member at the Oklahoma Medical Research Foundation where she worked on the national, collaborative Lipid Research Clinics Program. Dr. Cowan's research focuses on cardiovascular disease in adults, especially studies to elucidate gender differences in risk, and on the epidemiology of neurological disorders in infants and children, especially childhood epilepsy. Dr. Cowan has served as a member of the Epidemiology and Disease Control Study Section for the National Institutes of Health, is on the Editorial Board of Brain and Development, and is a member of the American Epidemiologic Society. She is currently on sabbatical at the Department of Pediatrics, New York University Medical Center.

MARIE R. GRIFFIN is Associate Professor of Preventive Medicine and Medicine at Vanderbilt University School of Medicine. She received her M.D. from Georgetown University School of Medicine and her M.P.H. from The Johns Hopkins University School of Hygiene and Public Health. She served as an Epidemiologic Intelligence Officer at the Centers for Disease Control. She is a fellow of the American College of Physicians and a member of the American Epidemiologic Society.  She is currently a Pharmacoepidemiology Scholar of the not-for-profit Burroughs Wellcome Fund. Her major area of interest for the past 5 years has been in the field of pharmacoepidemiology.

RICHARD B. JOHNSTON, JR., is the William H. Bennett Professor of Pediatrics, University of Pennsylvania School of Medicine, and Director of Research Education, The Children's Hospital of Philadelphia. He received