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Relatives of Eunice Kennedy Shriver, a sister of President Kennedy, were summoned Monday to a hospital on Cape Cod, Massachusetts, a source close to the family told CNN.

"It's minute to minute right now," the source said.

Shriver, 88, founder of the Special Olympics, has been in the hospital for several days, her family said, and her relatives were summoned after she suffered a setback, the source said. Read full article »

CNN's Ed Henry contributed to this report.

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