1. Medical University-Pleven, Emergency Department, Pleven, Bulgaria
2. Medical University-Pleven, Department of Anesthesilogy and Intensive Care, Pleven, Bulgaria
3. Medical University-Pleven, Department of Roentgenology and Radiology, Pleven, Bulgaria
4. Medical University-Pleven, Department of Surgery, Pleven, Bulgaria
5. Medical University-Pleven, Department of Cardiology, Pleven, Bulgaria
6. Medical University-Pleven, Department of Ortopaedics and Traumatology, Pleven, Bulgaria