1. Report of the Committee on Emphysema, American College of Chest Physicians.;Criteria for the assessment of reversibility in airways obstruction. Chest,1974
2. Does the use of a fixed percentage change in spirometric variables as a method of assessing changes in airway caliber have statistical validity (abstract).;Wall;Am Rev Respir Dis,1986
3. Tests of bronchodilator therapy (letter).;Chester;Chest,1978
4. Spirometry: FEV1 vs FEF25-75 percent.;Gelb;Chest,1983
5. Bronchodilator testing: confidence intervals derived from placebo inhalations.;Sourk;Am Rev Respir Dis,1983