“…48,50 Four systematic reviews were not preregistered in PROSPERO. 47,[51][52][53] Two scoping reviews 55,56 and a further four evidence reviews [57][58][59][60] were not eligible for registration in PROS-PERO. One meta-analysis, 50 two systematic reviews, 53,54 and one scoping review 56 referred to PRISMA guidelines, but four further reviews 48,49,51,52 did include a PRISMA-style flow diagram of progress in the review.…”