1. Department of Clinical Analysis, La Princesa University Hospital, Diego de León 62, 28006 Madrid, Spain
2. Physiology and Pathophysiology Teaching Unit, Faculty of Pharmacy, Complutense University of Madrid, 28040 Madrid, Spain
3. Department of Microbiology, La Princesa University Hospital, Diego de León 62, 28006 Madrid, Spain
4. Department of Anesthesiology and Surgical Intensive Care, La Princesa University Hospital, Diego de León 62, 28006 Madrid, Spain
5. Department of Emergency, La Princesa University Hospital, Diego de León 62, 28006 Madrid, Spain
6. Department of Digestive and General Surgical, La Princesa University Hospital, Autónoma University of Madrid, Diego de León 62, 28006 Madrid, Spain
7. Department of Preventive Medicine and Public Health, La Princesa University Hospital, Diego de León 62, 28006 Madrid, Spain