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González DA, Nazmi A, Yudkin JS, Victora CG.González DA, et al.Public Health Nutr. 2009 Nov;12(11):2225-35. doi: 10.1017/S1368980009990607. Epub 2009 Aug 6.Public Health Nutr. 2009.PMID: 19656435Free PMC article.
Vianna CA, González DA, Matijasevich A.Vianna CA, et al.Cad Saude Publica. 2012 Jun;28(6):1122-32. doi: 10.1590/s0102-311x2012000600011.Cad Saude Publica. 2012.PMID: 22666816Free article.Portuguese.