David Bergman is in private pediatric practice in Park City, Utah. This work was completed while he was a Pediatric Resident at Yale University School of Medicine. Eugene Shapiro is a Professor of Pediatrics and Epidemiology at Yale University School of Medicine and infectious disease specialist. John Leventhal is a Professor of Pediatrics at Yale University School of Medicine and Medical Director of the Child Abuse Committee at Yale-New Haven Hospital, New Haven, Connecticut.