
Keywords: ACE، آنزیم تبدیل آنژیوتانسین; Occupational lung disease; Elemental analysis; Granulomatosis; Aluminum dust; SarcoidosisEPMA, electron probe microanalyzer; WDS, wavelength dispersive spectrometer; ACE, angiotensin converting enzyme; SP-D, surfactant protein D; PPD, purified protein der