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Professional
Consumer
MSD Manual
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
RESOURCES
COMMENTARY
ABOUT US
HEALTH TOPICS
HEALTHY LIVING
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Authors
Jerry L. Spivak, MD, MACP
Specialities and Expertise
Hematology
Affiliations
Emeritus Professor of Medicine
Johns Hopkins University School of Medicine
Certifications
Internal Medicine;Hematology