Clinical Spectrum and Diagnostic Difficulties of Infantile Ponto-Cerebellar Hypoplasia Type 1 - Muntoni, F; Goodwin, Fiona; Sewry, Caroline; Cox, P; Cowan, Frances; Airaksinen, Eila; Patel, Shobna; Ignatius, J; Dubowitz, V (Neuropediatrics, 1999)