1. 2nd Department of Pulmonology, Pest County Institute of Pulmonology, T�r�kb�lint 2045, Hungary
2. Department of Thoracic Surgery, National Institute of Oncology, Budapest 1122, Hungary
3. 14th Department of Pulmonology and Internal Medicine, National Kor�nyi Institute of Pulmonology, Budapest 1121, Hungary
4. 1st Department, B�k�s County Pulmonology Hospital, Gyula 5701, Hungary
5. Department of Pulmonology, Semmelweis University, Budapest 1125, Hungary
6. Department of Oncology, Szent Borb�la County Hospital, Tatab�nya 2800, Hungary
7. 2nd Department of Internal Medicine, Uzsoki Hospital, Budapest 1145, Hungary
8. Department of Pulmonology, Bonyh�d Hospital, Bonyh�d 7150, Hungary
9. Department of Pulmonology; Faculty of Medicine, University of Szeged, Deszkry 6772, Hungary
10. Department of Pulmonology, University of P�cs, P�cs 7623, Hungary