Databases	Indexed and keyword terms
Pubmed	((((“Dengue”[Mesh]) OR dengue)) AND (((“Severe Dengue”[Mesh]) OR severe dengue) OR dengue severity)) AND (((“Diagnosis”[Mesh]) OR clinical diagnosis) OR warning signs) Filters: Publication date from 2009/01/01 to 2018/12/31
Embase	((“dengue”/exp OR “dengue”) AND “severe dengue”/exp OR “severe dengue” OR “dengue severity”) AND (“diagnosis”/exp OR “diagnosis” OR “clinical diagnosis” OR “warning signs”) AND (2009–2018)
Scopus	(TITLE-ABS-KEY (dengue AND severe AND dengue)) AND (diagnosis OR warning AND signs) (2009–2018)