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Health A-Z

Medical Content Created by the Faculty of the
Harvard Medical School

Additional Info

National Library of Medicine (NLM)
8600 Rockville Pike
Bethesda, MD 20894
Phone: (301) 594-5983
Toll-Free: (888) FIND-NLM (346-3656)
Fax: (301) 496-4450
http://www.nlm.nih.gov/

American College of Radiology
1891 Preston White Drive
Reston, VA 20191-4397
Toll-Free: (800) ACR-LINE (227-5463)
http://www.acr.org/flash.html/

Date Last Reviewed: 5/14/2012

Date Last Modified: 5/14/2012

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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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