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Health A-Z

Medical Content Created by the Faculty of the
Harvard Medical School

Additional Info

CDC National Prevention Information Network (NPIN)
National Center for HIV, STD and TB Prevention
P.O. Box 6003
Rockville, MD 20849-6003
Toll-Free: (800) 458-5231
Fax: (888) 282-7681
TTY: (800) 243-7012
http://www.cdcnpin.org/

Date Last Reviewed: 4/15/2014

Date Last Modified: 4/15/2014

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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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