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Ovalle A, López PJ, Guelfand M, Zubieta R.Ovalle A, et al. Among authors: lopez pj.Rev Chil Pediatr. 2016 May-Jun;87(3):175-9. doi: 10.1016/j.rchipe.2015.06.022. Epub 2015 Oct 17.Rev Chil Pediatr. 2016.PMID: 26481835Free article.Spanish.