1. Department of Paediatrics; Catholic University Medical School; Rome Italy
2. Department of Paediatrics; Paediatric Pain and Palliative Care Service; University of Padua; Padua Italy
3. Department of Paediatric Oncology; Catholic University Medical School; Rome Italy
4. Paediatric Residency; University of Trieste; Trieste Italy
5. Epidemiology and Biostatistics Unit; Institute for Maternal and Child Health - “IRCCS “Burlo Garofolo”; Trieste Italy
6. Department of Paediatrics; Institute for Maternal and Child Health - “IRCCS “Burlo Garofolo”; Trieste Italy
7. Paediatric Intensive Care Unit; Catholic University Medical School; Rome Italy