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The Levels of Evidence and Their Role in Evidence-Based Medicine

Burns, Patricia B. M.P.H.; Rohrich, Rod J. M.D.; Chung, Kevin C. M.D., M.S.

Plastic and Reconstructive Surgery: July 2011 - Volume 128 - Issue 1 - p 305-310
doi: 10.1097/PRS.0b013e318219c171
Special Topics: EBM Special Topic