Table 1.

Patient characteristics at admission.

Center	Patient	Case	Admission date	Age at admission	Trigger	Signs and symptoms at admission
1	1 female	1	02/2020	1 week	Neonatal	Neurological disorders (boxing movements)
		2	07/2020	5 months	Surgery	None (previous neurological injury on MRI)
2	2 male	3	02/2016	7 days	Neonatal	Irritability; coma with cerebral oedema 12 h after admission
	3 male	4	05/2015	2 years 3 months	Infection	Vomiting, nausea, respiratory distress
	4 male	5	12/2011	9 years	Infection	Vomiting, nausea, fever
	5 male	6	02/2017	16 years	Infection	Vomiting, nausea