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Ecological study of socio-economic indicators and prevalence of asthma in schoolchildren in urban Brazil

Sérgio Souza da Cunha email, Mar Pujades-Rodriguez email, Mauricio Lima Barreto email, Bernd Genser email and Laura C Rodrigues email

BMC Public Health 2007, 7:205doi:10.1186/1471-2458-7-205

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