Marta Schulman, chair of the American College of Radiology Pediatric Imaging Commission, said the study adds to the impetus that patients should be scanned only when necessary and with the lowest dose of radiation possible.

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He co-authored a study about cyanide poisoning and pediatric patients.

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"This is not a cure, " said Dr. Scott Adzick, lead author of the study and the chief of pediatric surgery at the Children's Hospital of Philadelphia.

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Scientists who work in the area of perinatal and pediatric epidemiology and who were associated with study but have now left, are looking on with a mixture of disbelief and exasperation at the staggering waste of resources and credibility.

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The study surveyed 100 parents, mostly mothers, who took their children to two pediatric urgent-care clinics in San Jose, Calif.

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That would have been that had it not been for Donald Shields, director of the pediatric epilepsy program at UCLA. In 1996, Shields and his colleague Roy Elterman had started a study of Sabril in infantile spasms.

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