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GRADE guidelines: 3. Rating the quality of evidence.
Balshem H, Helfand M, Schünemann HJ, Oxman AD, Kunz R, Brozek J, Vist GE, Falck-Ytter Y, Meerpohl J, Norris S, Guyatt GH. Balshem H, et al. Among authors: schunemann hj. J Clin Epidemiol. 2011 Apr;64(4):401-6. doi: 10.1016/j.jclinepi.2010.07.015. Epub 2011 Jan 5. J Clin Epidemiol. 2011. PMID: 21208779
Systematic reviewers neglect bias that results from trials stopped early for benefit.
Bassler D, Ferreira-Gonzalez I, Briel M, Cook DJ, Devereaux PJ, Heels-Ansdell D, Kirpalani H, Meade MO, Montori VM, Rozenberg A, Schünemann HJ, Guyatt GH. Bassler D, et al. Among authors: schunemann hj. J Clin Epidemiol. 2007 Sep;60(9):869-73. doi: 10.1016/j.jclinepi.2006.12.006. Epub 2007 Apr 11. J Clin Epidemiol. 2007. PMID: 17689802 Review.
707 results