PT  - JOURNAL ARTICLE
AU  - Doherty, Dennis E
TI  - Documentation of Airflow Obstruction Is Essential to Confirm the Diagnosis of COPD: Are Handheld Spirometers in an Office Setting Valid?
DP  - 2008 Apr 01
TA  - Respiratory Care
PG  - 429--430
VI  - 53
IP  - 4
4099  - http://rc.rcjournal.com/content/53/4/429.short
4100  - http://rc.rcjournal.com/content/53/4/429.full