WHAT Ä°S CHRONÄ°C OBSTRUCTÄ°VE PULMONARY DÄ°SEASE, OR COPD? WHAT CAUSES Ä°T? WHAT ARE Ä°TS SYMPTOMS? CRAÄ°G HERSCH, M.D, M.PH., PULMONOLOGÄ°ST AT BRÄ°GHAM AND WOMEN'S...
WHAT Ä°S CHRONÄ°C OBSTRUCTÄ°VE PULMONARY DÄ°SEASE, OR COPD? WHAT CAUSES Ä°T? WHAT ARE Ä°TS SYMPTOMS? CRAÄ°G HERSCH, M.D, M.PH., PULMONOLOGÄ°ST AT BRÄ°GHAM AND WOMEN'S...