2Yanagihare N,Gyo K,Sasamki Y et al. Prevention of recurrence of cholestoma in intact canal wall tympanoplasty. Am J Otol.1993,14:590
3Goycoolea MV. Mastoid and tympanomastoid procedures in otitis media :clasic mastoidectomy (simple, modified, and radical ) and current adaptation; open-cavity, and intact-bridge tympanomasoidectomy. Otolaryngol Clin North Am,1999,32(3):513
