du Prel Critical appraisal of scientific articles
du Prel J, Rohrig B, Blettner M. Critical appraisal of scientific articles. Deutsches Ärzteblatt International. 2009; 106(7) 100-5. DOI: 10.3238/arztebl.2009.0100
Clique no link du Prel appraisal of scientific articles.pdf para ver o arquivo.