Table 1. Complete Search Strategy for PubMed Databases.

Set	Strategy	Results
#1	(((("universal health care coverage") OR "universal healthcare coverage"[Title/Abstract]) OR "universal health coverage"[Title/Abstract]) OR "universal coverage"[Title/Abstract]) OR "UHC"[Title/Abstract] Filters: Publication date from 2000/01/01 to 2019/1/31; English	3735
#2	(Strength [TIAB] OR Strengthes [ TIAB] OR Transfor [TIAB] OR Transfores [TIAB] OR intervention [TIAB] OR interventions [TIAB] OR improve [TIAB] OR improvement [TIAB] OR programm [TIAB] OR programmes [TIAB] OR initiative [TIAB] OR initiatives [TIAB] OR innovation [TIAB] OR innovations [TIAB] OR Financing [TIAB] OR Financings [TIAB] OR "Service delivery" [TIAB] OR Stewardship [TIAB] OR "Resource generation" [TIAB]) Filters: Publication date from 2000/01/01 to 2019/1/31; English	1958401
#3	#1 AND #2	1666*
* Filters activated: Publication date from 2000/01/01 to 2019/1/31, English.