Direct vs Video Laryngoscopy for Difficult Airway Patients in the Emergency Department: A National Emergency Airway Registry Study oleh Brandon T. Ruderman, Martina Mali, Amy H. Kaji, Robert Kilgo, Susan Watts, Radosveta Wells, Alexander T. Limkakeng, Joseph B. Borawski, Andrea E. Fantegrossi, Ron M. Walls, Calvin A. Brown III