Sadé, J Secretory otitis media in adults: I. The role of mastoid pneumatizationas a risk factor. [electronic resource] - The Annals of otology, rhinology, and laryngology Aug 1996 - 643-7 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0003-4894 Standard No.: 10.1177/000348949610500810 doi Subjects--Topical Terms: AdolescentAdultAgedChronic DiseaseEustachian Tube--physiopathologyFemaleHumansMaleMastoid--abnormalitiesMiddle AgedOtitis Media with Effusion--physiopathologyRetrospective StudiesRisk Factors