1. Section of Plastic Reconstructive and Aesthetic Surgery and Thermal Trauma, Department of Propedeutics of Surgical Diseases, Faculty of Medicine, “St. George” University Hospital Plovdiv, Medical University of Plovdiv, “Peshtersko shausse Blvd 66”, 4002 Plovdiv, Bulgaria
2. Department of Anaesthesiology Emergency and Intensive Care Medicine, Clinic of Anaesthesiology and Intensive Care, “St. George” University Hospital Plovdiv, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria