Expression of HGF (A) and c-met (B) mRNA in lung tissue from emphysema and non-emphysema patients. Results are expressed as a ratio to Ubiquitin in arbitrary units. Individual and mean values (bar) are presented. No difference between groups was found. E: emphysema patients; S and NS: non-emphysematous smoker and non-smoker patients. HGF concentrations in lung homogenates were measured by immunoassay (C). The detection limit was 40 pg/ml. The results are displayed per 1 mg of lung tissue.