1. Department of Internal Medicine, Hospital Universitario Severo Ochoa, Leganés
2. Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Sevilla
3. Pneumology Service, Hospital Universitario Severo Ochoa, Leganés
4. Unit of Public Health, Prevention and Health Promotion, South Seville Health Management Area, Seville, Spain