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Alonso-Coello P, Irfan A, Solà I, Gich I, Delgado-Noguera M, Rigau D, Tort S, Bonfill X, Burgers J, Schunemann H.Alonso-Coello P, et al.Qual Saf Health Care. 2010 Dec;19(6):e58. doi: 10.1136/qshc.2010.042077.Qual Saf Health Care. 2010.PMID: 21127089Review.
Barajas-Nava L, Solà I, Delgado-Noguera M, Gich I, Villagran CO, Bonfill X, Alonso-Coello P.Barajas-Nava L, et al.Qual Saf Health Care. 2010 Dec;19(6):e50. doi: 10.1136/qshc.2009.038653.Qual Saf Health Care. 2010.PMID: 21127093Review.