Authors
V. Ilieva
Anaesthesiology and Intensive Care, University Hospital of Pulmonary Diseases, Medical University Sofia, Bulgaria
T. Mihalova
First Therapeutic Clinic, University Hospital of Pulmonary Diseases, Medical University Sofia, Bulgaria
Yo. Yamakova
Anaesthesiology and Intensive Care, University Hospital of Pulmonary Diseases, Medical University Sofia, Bulgaria
R. Petkov
First Therapeutic Clinic, University Hospital of Pulmonary Diseases, Medical University Sofia, Bulgaria
B. Velev
Anaesthesiology and Intensive Care, University Hospital of Pulmonary Diseases, Medical University Sofia, Bulgaria