{{Cite journal| doi = 10.1097/01.TA.0000034231.94460.1F| issn = 0022-5282 (Print) 0022-5282 (Linking)| volume = 55| issue = 2| pages = 355–61| last = Osterwalder| first = J. J.| title = Mortality of blunt polytrauma: a comparison between emergency physicians and emergency medical technicians--prospective cohort study at a level I hospital in eastern Switzerland| journal = J Trauma| date = 2003-08-13| pmid = 12913649}}