Validity of parental-reported questionnaire data on Danish children’s use of asthma-drugs: A comparison with a population-based prescription database

Author: Wogelius Pia   Poulsen Sven   Toft Sørensen Henrik  

Publisher: Springer Publishing Company

ISSN: 0393-2990

Source: European Journal of Epidemiology, Vol.20, Iss.1, 2005-01, pp. : 17-22

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