Validity of a questionnaire survey: the role of non-response and incorrect answers

Author: Sjöström Ove   Holst Dorthe   Lind Sven Ove  

Publisher: Informa Healthcare

ISSN: 0001-6357

Source: Acta Odontologica Scandinavica, Vol.57, Iss.5, 1999-12, pp. : 242-246

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Abstract