David Atkins, Dana Best, Peter Briss, Martin Eccles, Yngve Falck-Ytter, Signe Flottorp, Gordon Guyatt, Robin Harbour, Margaret Haugh, David Henry, Suzanne Hill, Roman Jaeschke, Gillian Leng, Alessandro Liberati, Jacek Mrukowicz Nicola Magrini, James Mason, Philippa Middleton, Dianne O'Connell, Andrew D Oxman, Bob Phillips, Holger J Schünemann, Tessa Tan-Torres Edejer, Helena Varonen, Gunn Vist, John Williams Jr, Stephanie Zaza,
Grading quality of evidence and strength of recommendations. BMJ. ,vol. 328, pp. 1490- 1490 ,(2004) ,
10.1136/BMJ.328.7454.1490