Result: Parameters of pulmonary function tests in patients had been decreased: FVC: 2.81 ± 0.52L; FVC%: 86.6 ± 12.8%, FEV1: 0.85 ± 0.34L, FEV1%: 53.1 ± 22.9%, FEV1/FVC%: 52.4 ± 10.6%, FEF 25 - 75%: 25.6 ± 13.8%, PEF%: 27.4 ± 14.9%.