The Users' Guides to the Medical Literature was originally published as a 25 part series in JAMA between 1993-2000. Some of the most relevant articles from the series are listed below. The current Users' Guides (2nd edition, 2008) are published as a book (see link to online version below or read the print copy located at MU HSL Reference WB 39.U845 2008).
"Evidence Pyramid" by Dartmouth Biomedical Libraries is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Based on a work at https://researchguides.library.tufts.edu/c.php?g=249245&p=3701848.