This collection houses previously published articles published in traditional scholarly and scientific journals when allowed by the copyright holder through express written consent, policy, or license.
Once a manuscript has been published in a traditional journal, the Sigma Repository does not review or judge the quality of the individual article and relies on the scientific publishing and review process of the individual journal. The presence of an article in this repository does not reflect an endorsement of, or concurrence with, the contents of the article by Sigma or the Sigma Repository.
Submissions from 2009
Essential skills for evidence-based practice: Strength of evidence, Jeanne T. Grace
