PT  - JOURNAL ARTICLE
AU  - L. Willis
TI  - COPD Challenge
DP  - 2007 Sep 01
TA  - Breathe
PG  - 73--81
VI  - 4
IP  - 1
4099  - http://breathe.ersjournals.com/content/4/1/73.short
4100  - http://breathe.ersjournals.com/content/4/1/73.full
SO  - breathe2007 Sep 01; 4