Developing a geographic search filter to identify randomised controlled trials in Africa: finding the optimal balance between sensitivity and precision

Health Information & Libraries Journal (2011) - Comments
pubmed: 21831220 doi: 10.1111/j.1471-1842.2011.00936.x issn: 1471-1834 issn: 1471-1842

Elizabeth Pienaar, Liesl Grobler, Karishma Busgeeth, Anne Eisinga, Nandi Siegfried