How important are paper copies of questionnaires? Testing invitations modes when studying social inequalities in smoking among young adults

Author: Gagné Thierry   Agouri Rowena   Cantinotti Michael   Boubaker Anis   Frohlich Katherine  

Publisher: Springer Publishing Company

ISSN: 1661-8556

Source: International Journal of Public Health, Vol.59, Iss.1, 2014-02, pp. : 207-210

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