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Systems for grading the quality of evidence and the strength of recommendations I: Critical appraisal of existing approaches The GRADE Working Group

David Atkins, Martin Eccles, Signe Flottorp, Gordon H Guyatt, David Henry, Suzanne Hill, Alessandro Liberati, Dianne O'Connell, Andrew D Oxman, Bob Phillips, Holger Schünemann, Tessa TT Edejer, Gunn E Vist*, John W Williams and The GRADE Working Group

BMC Health Services Research 2004, 4:38 doi:10.1186/1472-6963-4-38

Pre-publication versions of this article and reviewers' reports

Original Submission - Version 1 Manuscript 23 Jan 2004
Reviewer's Report Benjamin Djulbegovic 08 Mar 2004
Reviewer's Report Michael Bigby 22 Mar 2004
Reviewer's Report Joseph WATINE 25 Mar 2004
Reviewer's Report Anja Tuulonen 30 Mar 2004
Resubmission - Version 2 09 Nov 2004
Resubmission - Version 3 Manuscript 09 Nov 2004
Reviewer's Report Anja Tuulonen 22 Nov 2004
Resubmission - Version 4 Manuscript Author's comment 13 Dec 2004
Published 22 Dec 2004