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Pediatric Pulmonology > 57 > 7 > 1809 - 1813
The Clinical Respiratory Journal > 14 > 2 > 140 - 147
Archives de pediatrie > 2003 > 10 > Supplement 5 > s588-s591
European Journal of Epidemiology > 2000 > 16 > 9 > 837-842
Pediatric Pulmonology > 57 > 7 > 1809 - 1813
The Clinical Respiratory Journal > 14 > 2 > 140 - 147
Archives de pediatrie > 2003 > 10 > Supplement 5 > s588-s591
European Journal of Epidemiology > 2000 > 16 > 9 > 837-842