PT  - JOURNAL ARTICLE
AU  - P. M. Calverley
AID  - 10.1183/09059180.00010501
DP  - 2007 Sep 01
TA  - European Respiratory Review
PG  - 89--90
VI  - 16
IP  - 105
4099  - http://err.ersjournals.com/content/16/105/89.short
4100  - http://err.ersjournals.com/content/16/105/89.full
SO  - EUROPEAN RESPIRATORY REVIEW2007 Sep 01; 16