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Table 1 Search strategy for healthcare service utilization’s comparative studies

From: A systematic review of the use of health services by immigrants and native populations

General practitioner use (electronic search):
 1. Health Services Needs and Demand/ 12. health services [Title] 23. 18–22 / OR
 2. Health Status/ 13. Primary care [Title] 24. immigrant* [Title]
 3. Health Services Accessibility/ 14. Emergency services [Title] 25. migrant* [Title]
 4. Coverage [Title] 15. Utilization patterns [Title] 26. Ethnic Groups [Title]
 5. 1–4 / OR 16. 6–15/ OR 27. 24–26 / OR
 6. health care [Title] 17. 5 and 16 28. 23 and 27
 7. health disparities [Title] 18. Emigration and Immigration/ 29. Health AND utilization AND immigrant* [Title]
 8. access to care [Title] 19. Emigrants and Immigrants/ 30. 17 AND 28
 9. health resources [Title] 20. Native [Title] 31. 29 or 30 (GPs precise search)
 10. health profiles [Title] 21. Foreign [Title] 32. (16 AND 27) OR 29 (GPs exhaustive search)
 11. health status [Title] 22. Autochthonous [Title]  
Specialist use (electronic search):
 1. Health Services/utilization/ 7. Emigrants and Immigrants/ 13. Specialization/
 2. Health Services Accessibility/ 8. Ethnic Groups 14. speciali* [TI]
 3. Health Status/ 9. Native [Title] 15. 13 OR 14
 4. Coverage [Title] 10. Foreign [Title] 16. 5 AND 12 AND 15
 5. 1–4 / OR 11. Autochthonous [Title]  
 6. Emigration and Immigration/ 12. 6–11 / OR