1. From the Department of Paediatric Neurology (V.H., I.K.-M.), University Children's Hospital Tübingen, Germany; Norwegian Quality and Surveillance Registry for Cerebral Palsy (G.L.A.), Vestfold Hospital Trust, Tønsberg, Norway; CERPOP (C.A.), UMR 1295 Toulouse University, Inserm, Paul Sabatier University, Toulouse; Clinical Epidemiology Unit (C.A.), University Hospital of Toulouse, France; Imas12 (J.D.L.C.), Hospital Universitario 12 de Octubre, RedSAMID, Madrid Spain; Department of Pediatrics (I.D.)...