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Catalá-Antúnez I, de Quintana-Schmidt C, Clavel-Laria P, Montes-Graciano G, Molet-Teixidó J.Catalá-Antúnez I, et al.Neurocirugia (Astur). 2011 Aug;22(4):337-41.Neurocirugia (Astur). 2011.PMID: 21858408Spanish.