1. Department of Anaesthesiology and Surgical Intensive Care, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
2. Department of Preventive Medicine and Public Health, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
3. Department of Intensive Care Medicine, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
4. Department of Clinical Analysis, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
5. Department of General Surgery, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
6. Department of Emergency, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
7. Department of Microbiology, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
8. Department of Internal Medicine, Hospital Universitario de La Princesa, Diego de León 62, 28006 Madrid, Spain
9. Department of Intensive Care Medicine, Hospital Universitario Príncipe de Asturias, Avenida Principal de La Universidad s/n, 28805 Madrid, Spain