1. Division of Rheumatology; Ospedale Pediatrico Bambino Gesù IRCCS; Roma Italy
2. B Cell Physiopathology Unit; Immunology Research Area; Ospedale Pediatrico Bambino Gesù IRCSS; Roma Italy
3. Department of Pediatrics; La Sapienza University of Rome; Rome Italy
4. University Department of Pediatrics; Unit of Immune and Infectious Diseases; Bambino Gesù Children's Hospital; University of Rome “Tor Vergata”; Rome Italy
5. Pediatric and Infectious Disease Unit; Bambino Gesù Children's Hospital IRCCS; Rome Italy
6. Department of Rheumatology and Inflammation Research; University of Gothenburg; Gothenburg Sweden