1 Department of Infectious Diseases, Hospital Universitario Ramón y Cajal, Facultad de Medicina, Universidad de Alcalá, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain.
2 Centro de Investigación Biomédica En Red (CIBER) de Enfermedades infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain.
3 Section for Clinical Immunology and Infectious Diseases, Oslo University Hospital Rikshospitalet, Oslo, Norway.
4 Department of Biomedical Sciences & F. Widjaja Inflammatory Bowel Disease Institute, Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical Center, Los Angeles, CA, United States.
5 Clinic of Infectious Diseases, Department of Health Sciences, University of Milan, ASST Santi Paolo e Carlo, Milan, Italy.