Authors
E. Mekov
Department of Occupational Diseases, Faculty of Medicine, Medical University – Sofia, Bulgaria
N. Yanev
Department of Respiratory Diseases, Faculty of Medicine, Medical University – Sofia, Bulgaria
N. Kurtelova
Department of Respiratory Diseases, Faculty of Medicine, Medical University – Sofia, Bulgaria
T. Mihalova
Department of Respiratory Diseases, Faculty of Medicine, Medical University – Sofia, Bulgaria
G. Yankov
Department of Respiratory Diseases, Faculty of Medicine, Medical University – Sofia, Bulgaria
Y. Yamakova
Department of Anaesthesia, Resuscitation and Intensive Care, National Oncology Hospital – Sofia, Bulgaria
R. Petkov
Department of Respiratory Diseases, Faculty of Medicine, Medical University – Sofia, Bulgaria
