1. Department of Pediatrics Hospital Clínico Universitario de Valencia Valencia Spain
2. University of Valencia Valencia Spain
3. Pediatric Gastroenterology Department Hospital Universitario La Paz Madrid Spain
4. Pediatric Infectious Diseases Department Hospital Universitario La Paz Madrid Spain
5. Translational Research Network in Pediatric Infectious Diseases (RITIP) Madrid Spain
6. Department of Microbiology Hospital Clínico Universitario de Valencia Valencia Spain
7. Department of Microbiology Hospital Universitario La Paz Madrid Spain