9Stenfors LE. Repair of tympanic membrance perforation using hyaluranic acid, an allemative to myringoplasy [ J ]. J Laryngol Otol, 1989:103 ( 1 ) : 39
10Martini A,Morra B,Aimoni C et al. Use of a Hyaluronan -based biomembrane in the treatment of chronic cholesteatomatous otitismedia[ J ]. AM J Otol,2000,21:468