Day care in relation to respiratory-tract and gastrointestinal infections in a German birth cohort study.
Zutavern, Anne; Rzehak, Peter; Brockow, Inken; Schaaf, Beate; Bollrath, Christina; von Berg, Andrea; Link, Elke; Kraemer, Ursula; Borte, Michael; Herbarth, Olf; Wichmann, H.-Erich; Heinrich, Joachim; Acta Paediatrica, 2007, vol. 96, issue 10, p 1494, ISSN 08035253. ISBN 08035253.

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