1 Medical University Plovdiv, Department of Diagnostic Imaging - Plovdiv, Bulgaria.
2 Complex Oncology Center Plovdiv, Department of Diagnostic Imaging - Plovdiv, Bulgaria.
3 Medical University Plovdiv, Faculty of Medicine, Department of Propaedeutics of Surgical Diseases, Section of Plastic, Reconstructive and Aesthetic Surgery and Thermal Trauma - Plovdiv, Bulgaria.
4 Medical University Plovdiv, Department of Human Anatomy, Histology and Embryology - Plovdiv, Bulgaria.
5 Trakia University, Medical College - Stara Zagora, Bulgaria.