Health A-Z

Medical Content Created by the Faculty of the Harvard Medical School


Additional Info

National Library of Medicine (NLM)
8600 Rockville Pike
Building 38
Bethesda, MD 20894
Phone: (301) 594-5983
Toll-Free: (888) FIND-NLM (346-3656)
Fax: (301) 496-4450

American Heart Association (AHA)
7272 Greenville Ave.
Dallas, TX 75231
Toll-Free: (800) 242-8721
Fax: (214) 706-2139

Date Last Reviewed: 1/14/2013

Date Last Modified: 1/14/2013

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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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