Fig. 1From: Nine golden codes: improving the accuracy of Helicopter Emergency Medical Services (HEMS) dispatch—a retrospective, multi-organisational study in the East of EnglandHEMS dispatches in the East of England (2016–2019) with complete AMPDS code data. HEMS patient contact, and HEMS-level intervention/drug/diagnostic (HLIDD). HEMS Helicopter Emergency Medical Service. AMPDS Advanced Medical Priority Dispatch System. Stand-down—the HEMS team were not required and were cancelled before patient contactBack to article page