Research study designs: Experimental and quasi-experimental
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Editors' note: This article is the third in a multipart series designed to improve the knowledge base of readers, particularly novices, in the area of clinical research. A better understanding of these principles should help in reading and understanding the application of published studies. It should also help those involved in beginning their own research projects.
PII: S1067-991X(06)00286-0
doi:10.1016/j.amj.2006.09.001
© 2006 Air Medical Journal Associates. Published by Elsevier Inc. All rights reserved.
