Effect of questionnaire structure on recall of drug utilization in a population of university students

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Research article

Helena Gama¹ , Sofia Correia¹^,2 and Nuno Lunet¹^,2

¹Department of Hygiene and Epidemiology, University of Porto Medical School, Porto, Portugal

²Institute of Public Health – University of Porto (ISPUP), Porto, Portugal

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BMC Medical Research Methodology 2009, 9:45doi:10.1186/1471-2288-9-45


Published:	29 June 2009

Additional file 1:

Questionnaire A. The data represent the version A of the questionnaire used in this study.

Format: DOC Size: 112KB Download file

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Additional file 2:

Questionnaire B. The data represent the version B of the questionnaire used in this study.

Format: DOC Size: 46KB Download file

This file can be viewed with: Microsoft Word Viewer