ET-View compared to direct laryngoscopy in patients with immobilized cervical spine by inexperienced physicians: a randomized crossover manikin trial - Karczewska, Katarzyna; Szarpak, Lukasz; Smereka, Jacek; Dabrowski, Marek; Ladny, Jerzy; Wieczorek, Wojciech; Robak, Oliver; Frass, Michael; Ahuja, Sanchit; Ruetzler, Kurt (Anestezjologia Intensywna Terapia, 2017)