1. Department of Emergency Medicine, Semey Medical University, Semey 071400, Kazakhstan
2. Department of Epidemiology and Biostatistics, Semey Medical University, Semey 071400, Kazakhstan
3. Department of Anesthesiology and Reanimatology, Semey Medical University, Semey 071400, Kazakhstan
4. Department of Family Medicine, Semey Medical University, Semey 071400, Kazakhstan
5. National Coordinating Center for Emergency Assistance, Astana 10000, Kazakhstan