[1
]
a Pediatrics , Children's Hospital, University of Helsinki and Helsinki University
Hospital , Helsinki , Finland.
[2
]
b Pediatrics, PEDEGO Research Unit , University of Oulu and Oulu University Hospital
, Oulu , Finland.
[3
]
c Pediatrics , Tampere University and University Hospital , Tampere , Finland.
[4
]
d Department of Pediatrics and Adolescent Medicine , Turku University Hospital and
University of Turku , Turku , Finland.
[5
]
e Pediatrics , Kuopio University Hospital , Kuopio , Finland.
[6
]
f Laboratory Services (HUSLAB), Division of Clinical Microbiology , University of
Helsinki and Helsinki University Hospital , Helsinki , Finland.
[7
]
g National Institute for Health and Welfare (THL) , Oulu , Finland.
[8
]
h Pediatric Neurology , Children's Hospital, University of Helsinki and Helsinki University
Hospital , Helsinki , Finland.
[9
]
i Infectious Diseases , Children's Hospital, University of Helsinki and Helsinki University
Hospital , Helsinki , Finland.