“…As in the Spanish recommendations (Table 1), most of the 19 recommendations from the Canadian Initiative received a grade C/D from the Oxford Centre for Evidence-based Medicine, with a level of agreement > 80% in all of them 1,2 . The overall assessment of the recommendations, according to the Centre for Evidence-based Medicine, is low (C/D, with A the highest and D the lowest) because they are based on expert opinion, although their influence is strong, which can be inferred by their wide applicability to clinical practice.…”