1. eMedicine - Chronic Obstructive Pulmonary Disease and Emphysema : Article by Paul Kleinschmidt, MD
Chronic Obstructive Pulmonary Disease and Emphysema - Chronic obstructive pulmonary disease (COPD) is estimated to affect 32 million persons in the United States and is the fourth leading cause of death in this country.
http://www.emedicine.com/emerg/topic99.htm

2. chronic obstructive pulmonary disease - General Practice Notebook
chronic obstructive pulmonary disease - General Practice Notebook. Chronic obstructive pulmonary disease (COPD) is a general term which covers many previously used clinical labels which are now recognised as being different aspects of the same...
http://www.gpnotebook.co.uk/simplepage.cfm?ID=7012356

3. Official SPIRIVA Site—COPD—Chronic Bronchitis and Emphysema
Learn about SPIRIVA, a prescription treatment for chronic obstructive pulmonary disease (COPD), including chronic bronchitis and emphysema. Prescribing Information. Healthcare Professionals. If you or someone you know needs help paying for...
http://www.spiriva.com/