EBSCO - MEDLINE and CINAHL
XB (onscene N2 time* OR scene N2 time* OR prehospital N1 time* OR site N2 time* OR on N2 scene)
OVID – EMBASE and EMCARE
((onscene adj2 time*) or (scene adj2 time*) or (prehospital adj1 time*) or (site adj2 time*) or (on adj2 scene)).ti,ab.
Updated 03 April 2025