“…Seventeen new systematic reviews were commissioned to assess topics not addressed in existing reviews and 21 additional existing systematic reviews and meta analyses were assessed by the GDG ( Supplementary Table S2 ). 7 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 The quality of the scientific evidence for each intervention was graded using the Grading of Recommendations Assessment, Development and Evaluation (GRADE), 40 and evidence was categorised as high, moderate, low and very low certainty. The Confidence in the Evidence from Reviews of Qualitative research (CERQual) 41 approach was used for qualitative evidence.…”