Theme	Search terms
Scientific advisory committees	1. Scientific advisory committee.tw 2. ((Scientific or expert or technical) adj3 (committee or body or panel or board or commission or group*)).tw. 3. Advisory committees 4. ((Committee or body or panel or board or commission or group) adj (methods or construction or creation or design or develop* or effective*)).tw.
Institutional design features	5. Consensus 6. Group processes 7. Group structure 8. Decision making 9. Consultation 10. Transparency 11. Diversity 12. Size
Outputs	13. Delivery of health care 14. Guideline
SAC and design features	15. (1 or 2 or 3 or 4) and (5 or 6 or 7 or 8 or 9 or 10 or 11 or 12)
SAC and outputs	16. (1 or 2 or 3 or 4) and (13 or 14)
	17. 15 or 16
Meta‐analysis or systematic review filter	18. limit 17 to (Meta‐analysis or systematic reviews)