TY - JOUR T1 - Documentation of Airflow Obstruction Is Essential to Confirm the Diagnosis of COPD: Are Handheld Spirometers in an Office Setting Valid? JF - Respiratory Care SP - 429 LP - 430 VL - 53 IS - 4 AU - Dennis E Doherty Y1 - 2008/04/01 UR - http://rc.rcjournal.com/content/53/4/429.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -