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ENGLISH
MERCK MANUAL
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
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COMMENTARY
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HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
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COMMENTARY
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About the Merck Manuals
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Authors
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karen mckoy
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Karen McKoy, MD, MPH
Affiliations
Assistant Clinical Professor, Dermatology
Harvard Medical School
Senior Staff
Lahey Clinic Dermatology