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NIH MedlinePlus the Magazine, Trusted Health Information from the National Institutes of Health

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NATIONAL LIBRARY OF MEDICINE
at the NATIONAL INSTITUTES OF HEALTH

8600 Rockville Pike • Bethesda, MD 20894
www.nlm.nih.gov
www.medlineplus.gov

Donald A.B. Lindberg, M.D.
Director, NLM

Betsy L. Humphreys, M.L.S., A.H.I.P.
Deputy Director, NLM

Donald West King, M.D.
Deputy Director for Research and Education, NLM

Kathleen Cravedi
Director, Office of Communications and Public Liaison, NLM

Elliot Siegel, Ph.D.
Associate Director for Health Information Programs Development, NLM

Naomi Miller, M.L.S.
Manager of Consumer Health Information, NLM

Patricia Carson
Special Assistant to the Director, NLM

Christopher Klose
Magazine Coordinator

Peter Reinecke
Strategic Advisor, NLM

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NIH MedlinePlus Magazine Editorial Board

Don Detmer, M.D. • Jordan Cohen, M.D. • The Hon. Paul G. Rogers Jay Sanders, M.D. • Barbara Redman, Ph.D. • Roger Bulger, M.D. Kenneth Forde, M.D. • Leslie Kuhn, M.D.

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Selby Bateman, Ginny Gaylor, Managing Editors
Jan McLean, Creative Director
Traci Marsh, Production Director

NIH MedlinePlus, the Magazine is published by
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407 Norwalk St.
Greensboro, NC 27407
(336) 547-8970

William G. Moore, President
Pat Blake, Controller
Pat Schrader, Administrative Assistant

ISSN: 1937-4712

Articles in this publication are written by professional journalists. All scientific and medical information is reviewed for accuracy by representatives of the National Institutes of Health. However, personal decisions regarding health, finance, exercise, and other matters should be made only after consultation with the reader's physician or professional advisor. Opinions expressed herein are not necessarily those of the National Library of Medicine. Photos and other images without credit lines are provided by NIH.

Winter 2009 Issue: Volume 4 Number 1 Page 1