Harbitz, O Quantitation of proteins in sputum from patients with chronic obstructive lung disease. I. Determination of immunoglobulin A. [electronic resource] - European journal of respiratory diseases Apr 1980 - 84-94 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0106-4339 Subjects--Topical Terms: Carbohydrates--analysisColostrum--immunologyFluorescent Antibody TechniqueHumansImmunodiffusionImmunoglobulin A--analysisLung Diseases, Obstructive--immunologyProteins--analysisSputum--analysisViscosity