By vgreene, 22 January, 2015 C:Consensus—No supporting evidence; recommendation based on clinical opinion
By vgreene, 22 January, 2015 L:Limited—Evidence from ≥1 low-strength studies w/ consistent findings, or evidence from a single, mod-strength study, or evidence is insufficient/conflicting
By vgreene, 22 January, 2015 M:Moderate—Evidence from ≥2 mod-strength studies w/ consistent findings or evidence from single, high-quality study