“…AMSTAR 2 assessments identified several methodologic weaknesses across all included reviews (see Appendix 3). More than half of the reviews did not refer to a protocol,22, 27, 28, 29, 32, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66 66.6% reviews did not explain the study designs for inclusion in the review,12, 28, 34, 54, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 70, 71, 72 73.3% did not provide the list of excluded studies,27, 28, 29, 32, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 69, 71, 72, 73, 74, 75 and 83.3% of reviews did not clearly state the sources of funding for the included studies 12, 22, 26, 27, 28, 29, 34, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 72, 73, 74, 75. Inter-rater agreement of the 2 authors was high (κ = 0.86).…”