Table 1.

Electronic databases searched

MEDLINE

MEDLINE in process

Cochrane library:

HTA (Health technology assessment) database

DARE (Database of abstracts of reviews of effects)

CENTRAL (Central register of controlled trials)

EED (NHS economic evaluation database)

CDSR (Cochrane database of systematic reviews)

PROSPERO (center for reviews and dissemination register of protocols of systematic reviews)

CINAHL (Cumulative index to nursing and allied health literature)

EMBASE

PsycINFO

DoPHER (Database of promoting health effectiveness reviews)

ASSIA (Applied social sciences index and abstracts)

SSCI (Social sciences citation index)

SCI (Science citation index)

Proquest nursing