title: Surface tension lowering substance of the Eustachian tube in non-suppurative otitis media: an experiment with dogs.
mesh_terms: D000818:Animals; D004285:Dogs; D005064:Eustachian Tube / Q000502:physiology*; D010033:Otitis Media / Q000139:chemically induced / Q000473:pathology; D011138:Polytetrafluoroethylene; D013500:Surface Tension; D013501:Surface-Active Agents / Q000032:analysis / Q000502:physiology*
chemical_list: D013501:Surface-Active Agents; D011138:Polytetrafluoroethylene