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Avila-Alvarez A, Carbajal R, Courtois E, Pertega-Diaz S, Muñiz-Garcia J, Anand KJ; Grupo Español del proyecto Europain.Avila-Alvarez A, et al.An Pediatr (Barc). 2015 Aug;83(2):75-84. doi: 10.1016/j.anpedi.2015.03.017. Epub 2015 May 13.An Pediatr (Barc). 2015.PMID: 25979386Free article.Spanish.