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Medycyna Pracy > 2017 > 68 > 4 > 479-489
The Journal of Allergy and Clinical Immunology > 2014 > 134 > 5 > 1057-1062.e5
Paediatric Respiratory Reviews > 2006 > 7 > 3 > 223-228
Respiratory Medicine > 2004 > 98 > 11 > 1108-1116
European Journal of Epidemiology > 1998 > 14 > 3 > 247-252