Figure 6From: Temporal differences in gamma-hydroxybutyrate overdoses involving injecting drug users versus recreational drug users in Helsinki: a retrospective studyLocation of overdose in group B. Patients with serious GHB and GBL overdose treated by Helsinki EMS in 2006-2007. Group B: call to emergency dispatching centre made outside the time frame of weekend nights. EMS: Emergency Medical Service, GHB: gammahydroxybutyrate, GBL: gammabutyrolactone.Back to article page