PT - JOURNAL ARTICLE AU - Whyte, Kenneth F AU - Addis, George J TI - Definitions of emphysema, chronic bronchitis, asthma, and airflow obstruction AID - 10.1136/thx.39.6.479-b DP - 1984 Jun 01 TA - Thorax PG - 479--479 VI - 39 IP - 6 4099 - http://thorax.bmj.com/content/39/6/479.3.short 4100 - http://thorax.bmj.com/content/39/6/479.3.full SO - Thorax1984 Jun 01; 39