Fig. 4From: Ambulances are for emergencies: shifting behaviour through a research-informed behaviour change campaignCalls to NURSE-ON-CALL during benchmark and campaign periods – monthly call volume, unadjusted (raw). NURSE-ON-CALL data could not be adjusted for seasonality as data was only available from August 2015. Medial averages for the seasonal factors require at least four full seasons of dataBack to article page