... anaesthesiologists with extensiveknowledge of establishing intravenous access, in bothperipheral and central lines, in critically ill patients in emergency situations. As part of their HEMS trainingprogramme, ... System (SAS) version 0.2 software for Windows (SASInstitute, Inc., Cary, North Carolina). Exact confidenceintervals were obtained by using the PROF FREQ proce-dure in SAS. A p-value < 0.05 ... Haukeland UniversityHospital, Bergen, NorwayFull list of author information is available at the end of the articleSunde et al. Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine...