File:The rise in non-systematic reviews, case reports, trials, and systematic reviews, 1950 to 2007 (as identified in MEDLINE).jpg
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The_rise_in_non-systematic_reviews,_case_reports,_trials,_and_systematic_reviews,_1950_to_2007_(as_identified_in_MEDLINE).jpg (683 × 458 pixels, file size: 21 KB, MIME type: image/jpeg)