Journal article
Systems for grading the quality of evidence and the strength of recommendations - I: Critical appraisal of existing approaches The GRADE Working Group
D Atkins, M Eccles, S Flottorp, GH Guyatt, D Henry, S Hill, A Liberati, D O'Connell, AD Oxman, B Phillips, H Schunemann, TTT Edejer, GE Vist, JW Williams
BMC Health Services Research | BMC | Published : 2004