Research letter
Symptoms irregularity and increased risk of COPD acute exacerbations
A. Duarte-de-Araújoa,b,c,
, P. Teixeiraa,b, V. Hespanhold,e, J. Correia-de-Sousaa,b,f
Corresponding author
a Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
b ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
c Respiratory Department, H. Sª Oliveira, Guimarães, Portugal
d Department of Pneumology, Centro Hospitalar de S. João, Porto, Portugal
e Faculty of Medicine (FMUP), University of Porto, Portugal
f Horizonte Family Health Unit, Matosinhos, Portugal
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