Figure 2From: Association of mast cells with lung function in chronic obstructive pulmonary diseaseThe relation between the concentration of tryptase positive mast cells and lung function in patients with COPD. 2a. MC-T in the epithelium of peripheral airways and FEV1/VC (%). 2b. MC-T in the subepithelial area of peripheral airways with FEV1/VC (%). FEV1/VC = the ratio of the forced expiratory volume in one second and vital capacity; MC-T = tryptase positive mast cells.Back to article page