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Hoyer, Hans Xaver; Vogl, Stefan; Schiemann, Uwe; Haug, Alexander; Stolpe, Erwin; Michalski, Thomas (2010). Prehospital ultrasound in emergency medicine: incidence, feasibility, indications and diagnoses. European journal of emergency medicine, 17(5), pp. 254-9. London: Lippincott Williams & Wilkins 10.1097/MEJ.0b013e328336ae9e
