1 Thoracic Tumors Unit, Pulmonology Department, Centro Hospitalar de Vila Nova de Gaia e Espinho, Vila Nova de Gaia, Portugal. Electronic address: nunofilipechina@msn.com.
2 Thoracic Tumors Unit, Pulmonology Department, Centro Hospitalar de Vila Nova de Gaia e Espinho, Vila Nova de Gaia, Portugal.
3 Pathology Department, Centro Hospitalar de Vila Nova de Gaia e Espinho, Vila Nova de Gaia, Portugal.