[1] Univ Toronto, Hosp Sick Children, Dept Med Imaging, 555 Univ Ave, Toronto, ON M5G 1X8, Canada
[2] Univ Toronto, Hosp Sick Children, Dept Infect Dis, 555 Univ Ave, Toronto, ON M5G 1X8, Canada
[3] Univ Toronto, Hosp Sick Children, Dept Neurol, 555 Univ Ave, Toronto, ON M5G 1X8, Canada