Data sources Numerous online databases were searched including:, the Cochrane Central Register of Controlled Trials, the Cochrane Library, MEDLINE Ovid and Embase Ovid). The US National Institutes of ...
Embase, Cochrane Central Register of Controlled Trials, Medline (Pubmed), Web of Science, Google Scholar, Scopus, LILACS database and bibliographies of clinical trials encountered during search. There ...
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