Use of GRADE for assessment of evidence about prognosis: rating confidence in estimates of event rates in broad categories of patients

Alfonso Iorio, Frederick A Spencer, Maicon Falavigna, Carolina Alba, Eddie Lang, Bernard Burnand, Tom McGinn, Jill Hayden, Katrina Williams, Beverly Shea, Robert Wolff, Ton Kujpers, Pablo Perel, Per Olav Vandvik, Paul Glasziou, Holger Schunemann, Gordon Guyatt