1. Department of Surgery, Catholic University Hospital “A.Gemelli,” Rome, Italy
2. Surgical Oncology Unit, Bambino Gesù Children Hospital IRCCS, Rome Italy
3. Department of Anesthesia and Intensive Care, University Hospital, Parma, Italy
4. Department of Anesthesia and Intensive Care, Catholic University Hospital “A.Gemelli,” Rome, Italy
5. Vascular Access Team, Gaslini Children Hospital IRCCS, Genova, Italy
6. Department of Clinical Science and Translational Medicine, “Tor Vergata” University, Rome, Italy
7. Department of Oncology, Catholic University Hospital “A.Gemelli,” Rome, Italy
8. Department of Pediatric Oncology and Hematology, University Hospital, Verona, Italy
9. Department of Pediatrics, Catholic University Hospital “A.Gemelli,” Rome, Italy
10. Unit for Research in Anaesthesia, Gaslini Children Hospital IRCCS, Genova, Italy
11. Pediatric Intensive Care Unit, Catholic University Hospital “A.Gemelli,” Rome, Italy
12. Pediatric Surgery Unit, Umberto Bosio Center for Digestive Diseases, Children Hospital, Alessandria, Italy
13. Pediatric Surgery Unit, Department of Maternal and Child Health, San Matteo Hospital IRCCS, Pavia, Italy
14. Department of Anesthesia and Intensive Care, Meyer Children Hospital IRCCS, Firenze, Italy
15. Infectious Diseases Unit, Catholic University Hospital “A.Gemelli,” Rome, Italy
16. Department of Anesthesia and Intensive Care, Santobono-Pausilipon Children Hospital, Napoli, Italy