1. Department of Emergency, Acceptance and General Pediatrics, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy
2. NESMOS Department, Faculty of Medicine and Psychology, Chair of Pediatrics, Sapienza University, c/o Sant'Andrea Hospital, Rome, Italy
3. National Centre for Epidemiology, Surveillance, and Health Promotion, National Institute of Health, Rome, Italy
4. Child Neuropsychiatry Unit, ISMEP- ARNAS CIVICO, Palermo, Italy
5. AOU Città della Salute e della Scienza, Department of Pediatric Emergency, Regina Margherita Children's Hospital, Turin, Italy
6. Pediatric Emergency Unit, Anna Meyer’s Children Hospital, Florence, Italy
7. Department of Medical Sciences, Pediatric Section, University of Ferrara, Italy
8. Pediatric Emergency Department, Giannina Gaslini Children's Hospital, IRCCS, Genova, Italy
9. IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC Neuropsichiatria dell’età Pediatrica, Bologna, Italy
10. Clinica Pediatrica, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
11. S.C.D.O. Neuropsichiatria Infantile AOU Maggiore della Carità, Novara, Italy
12. Department of Pediatrics, University of Perugia, Italy
13. Paediatric Neurology, Paediatric Department, Pisa University Hospital, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
14. Pediatric and Neonatological Unit, Maternal and Child Department, Nuovo Ospedale San Giovanni Battista, Foligno, Perugia, Italy
15. Section of Pediatrics and Child Neuropsychiatry, Department of Clinical and Experimental Medicine, University of Catania, Italy
16. Unit of Pediatrics and Pediatric Emergency, AOU Policlinico, PO San Marco, University of Catania, Italy.
17. Department of Pediatrics, Gravina Hospital, Caltagirone, Catania, Italy
18. Pediatric Headache Center, Neuroscience Department, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
19. Child Neuropsychiatry Unit, Department Pro.Mi.Se, G. D'Alessandro University of Palermo, Italy
20. Dipartimento di Scienze Clinico-Chirurgiche, Diagnostiche e Pediatriche, Università degli Studi di Pavia, Italy
21. Division of Paediatrics, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
22. Department of Pediatrics, University of L’Aquila, Italy
23. Systems Medicine Department, University of Rome Tor Vergata, Rome, Italy