title: Sound advice for tunnel travellers.
authors.forename: D W
authors.initials: DW
authors.lastname: Proops
mesh_terms: D004423:Ear / Q000503:physiopathology / Q000601:surgery*; D004427:Ear Diseases / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D011184:Postoperative Period; D011312:Pressure; D014195:Travel