“…We are aware of 17 reporting guidelines for research synthesis developed outside of the PRISMA banner (Table 1), sourced from the EQUATOR (Enhancing the QUAlity and Transparency Of health Research) Network library and literature searches conducted to inform the update to PRISMA 2009 39–55 . These 17 guidelines span the disciplines of health, 39–42,44,49–52 social sciences, 41,42,44,52 psychology, 45,46,54,55 neuroscience, 47 economics 53 and conservation and environmental management 48 . The content of some of these guidelines overlaps considerably with PRISMA 2009, while several provide guidance on topics not addressed in PRISMA 2009 or its extensions, including synthesis of qualitative data, 40,46 realist synthesis, 41 and synthesis of the quantitative effects of interventions using alternative methods to meta‐analysis 52 .…”