PT  - JOURNAL ARTICLE
AU  - Keene, O. N.
AU  - Calverley, P. M. A.
AU  - Jones, P. W.
AU  - Vestbo, J.
AU  - Anderson, J. A.
TI  - Statistical analysis of COPD exacerbations
AID  - 10.1183/09031936.00123408
DP  - 2008 Nov 01
TA  - European Respiratory Journal
PG  - 1421--1422
VI  - 32
IP  - 5
4099  - http://erj.ersjournals.com/content/32/5/1421.short
4100  - http://erj.ersjournals.com/content/32/5/1421.full
SO  - Eur Respir J2008 Nov 01; 32