LOH/MSI analysis in NSCLC specimens (3130xl Genetic Analyzer, GeneMapper Software v. 4.0; Applied Biosystems, Hitachi). 1a T—homozygous DNA from tumor sample (sample no. 35, D3S1583 marker), 1b N—homozygous DNA from macroscopically unchanged lung tissue from the same patient, 2a T—heterozygous DNA from tumor sample (sample no. 12, D3S1611 marker), 2b N—heterozygous DNA from macroscopically unchanged lung tissue from the same patient, 3a T—LOH in DNA from tumor sample (sample no. 5, D3S1234 marker), 3b N—heterozygous DNA from macroscopically unchanged lung tissue from the same patient, 4a T—MSI in DNA from tumor sample (sample no. 72, D3S1300 marker), 4b N—heterozygous DNA from macroscopically unchanged lung tissue from the same patient