Guideline Recommendation and Evidence Grading (GREG) : a new grading method for clinical guideline development groups /
Mason, James.
Eccles, Martin.
University of Newcastle upon Tyne.Centre for Health Services Research.
University of Newcastle upon Tyne.National Guideline Research and Development Unit.
Newcastle upon Tyne : Centre for Health Services Research, University of Newcastle upon Tyne,
c2003.
Includes bibliographical references.
Evidence-based medicine.