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A specific question on rural/urban/farming environment was not included because the population was restricted to children born in a city-based maternity unit and still living in the city and/or registered in a city school.

Bibliographische Detailangaben

Veröffentlicht in:	Journal of allergy and clinical immunology 2007-11, Vol.120 (5), p.1226
Hauptverfasser:	Linehan, Mary F, Morris, Julie A
Format:	Artikel
Sprache:	eng
Schlagworte:	Immunization
Online-Zugang:	Volltext
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