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2. Secretory otitis media and mastoid pneumatization;Hussl;Ann. Otol. Rninol. Laryngol.,1980
3. Middle ear inflammation and pneumatization of the tympanic bulla in the pig;Ikarashi,1989
4. Effect of tubal occlusion on mastoid pneumatization;Nakano,1989
5. Mastoid surgery in chronic secretory otitis media;Özbilen,1991