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Lizarazu A, Enríquez-Navascués JM, Placer C, Carrillo A, Sainz-Lete A, Elósegui JL.Lizarazu A, et al. Among authors: placer c.Cir Esp. 2011 May;89(5):269-74. doi: 10.1016/j.ciresp.2011.01.008. Epub 2011 Mar 22.Cir Esp. 2011.PMID: 21429480Review.Spanish.