Source: Public Health Image Library (PHIL).
Michael L. Levin, PhD. Available online: http://phil.cdc.gov/
Primary Medical Reviewer
Adam Husney, MD - Family Medicine
Specialist Medical Reviewer
Christine Hahn, MD - Epidemiology
Last Updated
September 21, 2006
WebMD Medical Reference from Healthwise
Last Updated:
September 21, 2006
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