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. 2008 Oct 3;10(4):e29. doi: 10.2196/jmir.1012

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© Arjen Hoogendam, Anton FH Stalenhoef, Pieter F de Vries Robbé, A John PM Overbeke. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 03.10.2008. Except where otherwise noted, articles published in the Journal of Medical Internet Research are distributed under the terms of the Creative Commons Attribution License (http://www.creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 1) the original work is properly cited, including full bibliographic details and the original article URL on www.jmir.org, and 2) this statement is included.

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The “5S” levels of organization of evidence from health care research and the position of the studied information sources within the pyramid (after Haynes [1])