to determine the applicability of the tracer to measurement of permeability in the airways the diffusion and binding characteristics of 99mtc dtpa and the chemically related ethylenediaminetetra-acetic acid labelled with carbon-14 ( 14c edta ) was studied in purified respiratory tract mucus glycoprotein from patients with chronic bronchitis .
C0035237
respiratory tract
C0008677
chronic bronchitis