Chronic Bronchitis Is Associated With Worse Symptoms and Quality of Life Than Chronic Airflow Obstruction.
Meek PM, Petersen H, Washko GR, Diaz AA, Klm V, Sood A, Tesfaigzi Y. Chronic Bronchitis Is Associated With Worse Symptoms and Quality of Life Than Chronic Airflow Obstruction. Chest. 2015 Aug; 148(2):408-416.