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Lupatsch, Judith E; Kreis, Christian; Korten, Insa Christina Severine; Latzin, Philipp; Frey, Urs; Kuehni, Claudia E; Spycher, Ben D (2018). Neighbourhood child population density as a proxy measure for exposure to respiratory infections in the first year of life: A validation study. PLoS ONE, 13(9), e0203743. Public Library of Science 10.1371/journal.pone.0203743
