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Pinilla M, Ramírez-Camacho R, García Berrocal JR, Alonso Martín MJ, López Bravo A.Pinilla M, et al.Acta Otorrinolaringol Esp. 1994 Jul-Aug;45(4):291-4.Acta Otorrinolaringol Esp. 1994.PMID: 7917483Spanish.