title: [Do you know this phenomenon?].
authors: L
authors: L
authors: Schirmer
mesh_terms: D064870:Air Travel; D000401:Aircraft; D001274:Atmospheric Pressure; D001469:Barotrauma / Q000209:etiology*; D003448:Crying; D004433:Earache / Q000209:etiology*; D005157:Facial Pain / Q000209:etiology*; D005858:Germany; D006801:Humans; D010256:Paranasal Sinuses / Q000293:injuries*; D012307:Risk Factors; D013666:Tears