1. Department of Internal Medicine, Hospital Universitario Severo Ochoa, Leganés, Madrid, Spain
2. Pneumology Service, Hospital Universitario Severo Ochoa, Leganés, Spain
3. 061 Health Emergency Centre, Andalusian Health Service, Sevilla, Spain
4. Unit of Public Health, Prevention and Health Promotion, South Seville Health Management Area, Seville, Spain