Longitudinal changes in the nature, severity and frequency of COPD exacerbations

Donaldson, GC and Seemungal, TAR and Patel, IS and Lloyd-Owen, SJ and Wilkinson, TMA and Wedzicha, JA

Terence Anand Seemungal

European Respiratory Journal

2003

6

22

931–936

Eur Respiratory Soc