Pulmonology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
P. Sousa
Faculty of Medicine of Porto University, Porto, Portugal
O. Oliveira
EPIUnit Institute of Public Health, University of Porto, Porto, Portugal
A. Rita Gaio
Centre of Mathematics, University of Porto, Porto, Portugal; Mathematics Department, Faculty of Sciences, University of Porto, Porto, Portugal
R. Duarte
Pulmonology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal; EPIUnit Institute of Public Health, University of Porto, Porto, Portugal; Chest Disease Centre, Vila Nova de Gaia, Portugal; Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal; Corresponding author.
