| Literature DB >> 17187048 |
Abstract
Previously in this series I have given an overview of the main types of study design and the techniques used to minimise biased results. In this article I describe more fully ecological studies, their uses, advantages and limitations.Mesh:
Year: 2006 PMID: 17187048 DOI: 10.1038/sj.ebd.6400454
Source DB: PubMed Journal: Evid Based Dent ISSN: 1462-0049