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Steffen RE, Caetano R, Pinto M, Chaves D, Ferrari R, Bastos M, de Abreu ST, Menzies D, Trajman A.Steffen RE, et al. Among authors: caetano r.PLoS One. 2013 Apr 4;8(4):e59546. doi: 10.1371/journal.pone.0059546. Print 2013.PLoS One. 2013.PMID: 23593145Free PMC article.
Biz AN, Caetano R.Biz AN, et al. Among authors: caetano r.Rev Saude Publica. 2015;49:57. doi: 10.1590/S0034-8910.2015049005447. Epub 2015 Aug 11.Rev Saude Publica. 2015.PMID: 26274871Free PMC article.