Retrieving randomized controlled trials from medline: a comparison of 38 published search filters
Health Information & Libraries Journal (2009) - Comments
pubmed: 19712211  doi: 10.1111/j.1471-1842.2008.00827.x  issn: 1471-1834  issn: 1471-1842 

Kathleen Ann McKibbon, Nancy Lou Wilczynski, Robert Brian Haynes,