?:authorAffiliation
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[\'Department of Pediatrics, Instituto de Medicina Integral Prof. Fernando Figueira, Recife, Brazil.\', \'Department of Biostatistics, Instituto de Medicina Integral Prof. Fernando Figueira, Recife, Brazil.\', \'Department of Community Health Sciences, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada. Electronic address: marcelo.urquia@umanitoba.ca.\']
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