Balazs Antus1,2, Imre Barta3. 1. Department of Pathophysiology, National Koranyi Institute of TB and Pulmonology, Piheno ut 1, Budapest, 1121, Hungary. antusb@hotmail.com. 2. Department of Pulmonology, National Koranyi Institute of TB and Pulmonology, Piheno ut 1, Budapest, 1121, Hungary. antusb@hotmail.com. 3. Department of Pathophysiology, National Koranyi Institute of TB and Pulmonology, Piheno ut 1, Budapest, 1121, Hungary.