title: COPD performance measures: missing opportunities for improving care.
authors.affiliation: Providence Portland Medical Center, 5050 NE Hoyt St, Ste 540, Portland, OR 97213, USA. John_heffner@mac.com
authors.forename: John E
authors.initials: JE
authors.lastname: Heffner
authors.forename: Richard A
authors.initials: RA
authors.lastname: Mularski
authors.forename: Peter M A
authors.initials: PM
authors.lastname: Calverley