van Schayck, C P Asthma and chronic bronchitis. Can family physicians predict rates of progression? [electronic resource] - Canadian family physician Medecin de famille canadien Nov 1995 - 1868-76 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0008-350X Subjects--Topical Terms: Asthma--diagnosisBronchitis--diagnosisBronchodilator Agents--therapeutic useChronic DiseaseCross-Sectional StudiesDisease ProgressionFamily PracticeFemaleForced Expiratory VolumeHumansMaleMiddle AgedPhysical ExaminationPrognosisTime Factors