Dr. Leon Eisenberg, a pioneer of research into developmental and learning disabilities, died Sept. 15 at age 87. Eisenberg was among the first to link language problems to autism and to conduct trials on medicines to treat attention-deficit disorders. Eisenberg "moved the field from simple descriptions of childhood disorders to actually looking at the science behind both the diagnosis and treatment," said Dr. James Harris, a professor of psychiatry and behavioral science at Johns Hopkins University.

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