Table 2 Medline Search Strategy

1. (infant* or newborn* or child* or "preschool child*" or juvenile* or preschool* or adolescent* or pediatric* or paediatric* or "young people" or "young person").tw,kw,kf

2. exp child/ or exp infant/

3. Adolescent/

4. exp Pediatrics/

5. 1 or 2 or 3 or 4

6. (ambulance* or "transportation of patient*" or "emergency service*" or "emergency medical service*" or EMS or "emergency health service*" or "prehospital care" or prehospital* or pre-hospital* or "out of hospital" or "out of hospital care" or "emergency medicine" or "pediatric emergency medicine" or "paediatric emergency medicine" or "emergency responder*" or "first responder*" or "emergency medical technician*" or "emergency technician*" or "emergency practitioner*" or " emergency medical practitioner*" or "emergency care practitioner*" or EMT or "rescue personnel*" or "emergency nurse*" or paramedic*).tw,kw,kf

7. Ambulances/

8. emergency medical services/ or advanced trauma life support care/ or "transportation of patients"/

9. exp Emergency Medicine/

10. emergency responders/ or emergency medical technicians/

11. Emergency Nursing/

12. 6 or 7 or 8 or 9 or 10 or 11

13. ("pain management*" or "pain treatment*" or "pain intervention*" or analgesi* or analgaesi* or "analgetic agent*" or "analgesic drug*" or anodynes or antinociceptive or NSAIDs or paracetamol or ketamine or fentanyl or "nitrose oxide" or methoyloxine or morphine or opoid or non-opoid or narcotics or non-narcotics or "regional nerve block*" or "per oral" or peroral or intravanous or "intra venous" or IV or intramuscular or "intra muscular" or "intra nasal" or intranasal or inhalational or "pain reduction" or "pain relief" or oligoanalgesia or "pain intensity" or "pain assessment" or "pain measurement" or effectiveness or "effect management" or "side effect*" or "adverse effect*" or "adverse event*").tw,kw,kf

14. Pain Management/

15. Analgesia/

16. exp Analgesics/

17. Nerve Block/

18. exp Fentanyl/

19. Ketamine/

20. Morphine/

21. Acetaminophen/

22. exp Drug Administration Routes/

23. Pain Measurement/

24. 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23

25. 5 and 12 and 24

26. limit 25 to (humans and yr = "2000—2020" and "all child (0 to 18 years)" and (danish or english or norwegian or swedish))