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Guedes HM, Cabral LO, Costa MV, Dos Reis AF, Pereira SG, Oliveira-Ferreira F.Guedes HM, et al.Rev Lat Am Enfermagem. 2012 May-Jun;20(3):536-42. doi: 10.1590/s0104-11692012000300015.Rev Lat Am Enfermagem. 2012.PMID: 22991116Free article.English, Portuguese, Spanish.