1 Pulmonology Department, Centro Hospitalar Vila Nova de Gaia/Espinho, Rua Conceição Fernandes, S/N, 4434-502 Vila Nova de Gaia, Portugal. Electronic address: rita.linhas@gmail.com.
2 Pulmonology Department, Centro Hospitalar Vila Nova de Gaia/Espinho, Rua Conceição Fernandes, S/N, 4434-502 Vila Nova de Gaia, Portugal.