By rray, 11 December, 2014 B:Evidence - limited populations evaluated, single RCT or nonrandomized studies
By rray, 11 December, 2014 A:Evidence - multiple populations evaluated, multiple RCTs or meta-analyses
By rray, 11 December, 2014 N:No recommendation for or against (insufficient/unclear/conflicting evidence)
By rray, 11 December, 2014 D:Recommendation against, at least moderate evidence-based certainty that it has no net benefit or that risks/harms outweigh benefit
By rray, 11 December, 2014 W:Weak recommendation, at least moderate evidence-based certainty that there is a small net benefit
By rray, 11 December, 2014 M:Moderate recommendation, moderate evidence-based certainty that net benefit is moderate to substantial, or high certainty that net benefit is moderate