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Archived page, reproduced from a 2004 copy. It is reference material, not current guidance.

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NHLBIHIN is an independent reference site. It is not affiliated with the U.S. National Institutes of Health. Historical materials on this site were originally published by U.S. federal agencies and are in the public domain (17 U.S.C. §105); they are reproduced as archived reference, not current clinical guidance.