Table 1.

Search string.

PubMed
1	(medical[all fields] AND dispatch*[all fields]) OR (emergency[all fields] AND dispatch*[all fields]) OR “Emergency Medical Dispatch”[all fields] OR dispatch centres[all fields]
2	triage[all fields]
3	Criteria based[all fields]
4	Physician based[all fields]
5	“emergency medicine” [all fields]
6	2 OR 3 OR 4 OR 5
7	1 AND 6
8	English, year> = 2012
Web of Science (Indexes = SCI-EXPANDED, SSCI, A&HCI, ESCI Timespan = All years)
1	Topic = (Emergency OR Medical OR centres) AND Dispatch*
2	Topic = triage
3	Topic = criteria based
4	Topic = physician based
5	Topic “emergency medicine”
6	2 OR 3 OR 4 OR 5
7	1 AND 6
8	7 AND English, year > = 2012, Article, Review
Embase (free text in all fields)
1	(emergency OR medical OR centres) AND dispatch*
2	Triage
3	criteria based
4	physician based
5	“emergency medicine”
6	2 OR 3 OR 4 OR 5
7	1 AND 6
8	7 AND English, year > = 2012, article, review, article in press
CRD - Centre for Reviews and Dissemination, York
1	Dispatch*, english, year > = 2012
Cochrane
1	(emergency OR medical OR centres) AND dispatch*
2	Triage OR criteria OR physician OR “emergency medicine”
3	1 AND 2
4	3 AND english, year > = 2012, NOT conference