Authors
irinavladimirovnalitvinenko@gmail.com
Department of Thoracic Surgery, Second Surgical Clinic, University Multiprofile Hospital for Active Treatment “N. I. Pirogov” –, Sofia, Bulgaria
S. Sopotensky
Department of Thoracic Surgery, Second Surgical Clinic, University Multiprofile Hospital for Active Treatment “N. I. Pirogov” –, Sofia, Bulgaria