1. Department of Medical Specialties and Public Health, Rey Juan Carlos University, 28922 Madrid, Spain
2. María Zambrano Program, Rey Juan Carlos University, European Union, 28922 Madrid, Spain
3. Department of Preventive Medicine, Hospital Universitario Fundación Alcorcón, Rey Juan Carlos University, 28922 Madrid, Spain
4. CIBER of Respiratory Diseases (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain