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Aller MB, Vargas I, Waibel S, Coderch J, Sánchez-Pérez I, Colomés L, Llopart JR, Ferran M, Vázquez ML.Aller MB, et al.Int J Qual Health Care. 2013 Jul;25(3):291-9. doi: 10.1093/intqhc/mzt010. Epub 2013 Feb 19.Int J Qual Health Care. 2013.PMID: 23425531