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2. The Cochrane Collaboration: preparing, maintaining and disseminating systematic reviews of the effects of health care;Chalmers;Annals of the New York Academy of Science,1993
3. The nursing management of leg ulcers in the community: a critical review of research;Cullum,1994
4. Critical reviews of the literature;Cullum,1994
5. The identification of randomised controlled trials in the nursing specialist literature;Cullum,1995