Table 2 Grading of the evidence in the Current Care guidelines.

Level	Description
A	Strong research‐based evidence (multiple, relevant, high‐quality studies with homogeneous results—eg, two or more randomised controlled trials or a systematic review with clearly positive results)
B	Moderate evidence (eg, one randomised controlled trial, or multiple adequate studies)
C	Limited research‐based evidence (eg, controlled prospective studies)
D	No evidence (eg, retrospective studies, or the consensus reached in the absence of good quality evidence)