1. Department of Pediatrics, Centro Hospitalar do Médio Ave, V. N. Famalicão, Portugal
2. Department of Pediatric Neurology, Centro Materno Infantil do Norte/Centro Hospitalar Universitário do Porto, Porto, Portugal
3. Department of Neurology, Hospital Santo António/Centro Hospitalar Universitário do Porto, Porto, Portugal
4. Multidisciplinary Unit for Biomedical Research, Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto, Portugal