1 Pulmonology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho (CHVNG), Vila Nova de Gaia, Portugal. Electronic address: ines.ladeira@chvng.min-saude.com.
2 Pulmonology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho (CHVNG), Vila Nova de Gaia, Portugal; Center of Pulmonology Diagnostics (CDP), Vila Nova de Gaia, Portugal.
3 Institute of Public Health, Porto University, Porto, Portugal.
4 Pulmonology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho (CHVNG), Vila Nova de Gaia, Portugal; Center of Pulmonology Diagnostics (CDP), Vila Nova de Gaia, Portugal; Public Health Department, ARS Norte, I.P. Porto, Portugal; Department of Epidemiology, Preventive Medicine and Health of Medicine Faculty, Oporto University, Porto, Portugal; Institute of Public Health, Porto University, Porto, Portugal.