Allergy in day care children: prevalence and environmental risk factors.
Hatakka, Katja 1; Piirainen, Laura 2; Pohjavuori, Sara 1,2; Poussa, Tuija 3; Savilahti, Erkki 4; Korpela, Riitta 1,2
[Article] Acta Paediatrica. 98(5):817-822, May 2009.

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