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Health A-Z

Medical Content Created by the Faculty of the
Harvard Medical School

Additional Info

National Heart, Lung, and Blood Institute (NHLBI)
P.O. Box 30105
Bethesda, MD 20824-0105
Phone: 301-592-8573
TTY: 240-629-3255
http://www.nhlbi.nih.gov/

Date Last Reviewed: 8/21/2012

Date Last Modified: 8/21/2012

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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

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