Clínica de Traumatología y Ortopedia Pediátrica;
Facultad de Medicina;
Universidad de la República;
Montevideo 11200;
Uruguay;
Department of Women’s and Children’s Health;
Karolinska Institutet;
Karolinska University Hospital;
Stockholm 17177;
Sweden;
Children; Cerebral; palsy; Gross; Motor; Function; Classification; System; Surgery; Epidemiology;