1. Department of Emergency Medicine, Faculty of Medicine Khon Kaen University Muang Khon Kaen Thailand
2. Emergency Medicine Unit Srisaket Hospital Muang Srisaket Thailand
3. Kukan Hospital Srisaket Thailand
4. Emergency Medicine Unit Queen Sirikit Heart Center of the Northeast Khon Kaen Thailand
5. Emergency Medicine Unit Khon Kaen Hospital Muang Khon Kaen Thailand
6. Yangchumnoi Hospital Srisaket Thailand
7. Kalasin Hospital Kalasin Thailand
8. Jun Hospital Payao Thailand
9. Wisetchaicharn Hospital Angthong Thailand