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Professional
Consumer
Merck Manual
Professional Version
MEDICAL TOPICS
RESOURCES
DRUG INFO
COMMENTARY
PROCEDURES
QUIZZES
ABOUT US
MEDICAL TOPICS
RESOURCES
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About the Merck Manuals
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Manuals Staff,
Manual Chapters and Commentaries
Chapters
Unit of Measure Conversions
Commentaries
Commentary: As We Seek Out More Medical Information, Trusted Sources Remain Essential
Commentaries