{{Cite journal| doi = 10.1136/emermed-2025-215335| issn = 14720205 (ISSN)| last1 = Rauch| first1 = S.| last2 = Pietsch| first2 = U.| last3 = Roveri| first3 = G.| title = Preoxygenation in prehospital critical care: a survey of HEMS practices in eight European countries| journal = Emergency Medicine Journal| date = 2026-01-17}}