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1 Thirteen databases included: 1) AMED; 2) British Library Direct; 3) British Nursing Index; 4) Centre for Reviews and Dissemination databases; 5) Cochrane Library; 6) EMBASE; 7) EconLit; 8) ERIC; 9) Ovid Medline; 10) PsycINFO; 11) Scopus; 12) Web of Science; and (13) Global Health Library Virtual Platform (World Health Organization).
