“…T o us th e reaso n fo r these differences is n o t clear. R e d u c tio n o f lu n g v o lu m es a n d v e n tila to ry c ap acities in sm okers w as r e p o rte d b y n u m e ro u s a u th o rs [1,4,5,9,13,14,20,22,23]. A n aly sis o f th e ir d a ta rev eals th a t a sig n ifican t decrease is to be fo u n d o n ly fo r g ro u p s w ith a long sm o k in g h isto ry [9,13,22,23].…”