1. Pulmonary Department, Hospital Clínico, and
2. Laboratory of Biochemistry and Molecular Pathology, Hospital Clínico de Valencia, Valencia, Spain;
3. Bioinformatics and Biostatistics Unit, INCLIVA, University of Valencia, Valencia, Spain;
4. Pulmonary Department, Hospital General, Valencia, Spain;
5. Pulmonary Department, Hospital Virgen de la Arrixaca, Murcia, Spain;
6. Pulmonary Department, Hospital Virgen del Rocío, Sevilla, Spain;
7. Pulmonary Department, Hospital los Arcos del Mar Menor, Murcia, Spain; and
8. Pulmonary Department, Hospital de La Princesa, Universidad Autónoma, Madrid, Spain