PT  - JOURNAL ARTICLE
AU  - Claus Vogelmeier
AU  - Jørgen Vestbo
TI  - COPD assessment: I, II, III, IV and/or A, B, C, D
AID  - 10.1183/09031936.00019714
DP  - 2014 Apr 01
TA  - European Respiratory Journal
PG  - 949--950
VI  - 43
IP  - 4
4099  - http://erj.ersjournals.com/content/43/4/949.short
4100  - http://erj.ersjournals.com/content/43/4/949.full
SO  - Eur Respir J2014 Apr 01; 43