Differential growth rates of the cerebellum and posterior fossa assessed by post mortem magnetic resonance imaging of the fetus: implications for the pathogenesis of the chiari 2 deformity. - Griffiths, P.D.; Wilkinson, I.D.; Variend, S.; Jones, A.; Paley, M.N.J.; Whitby, E. (Acta Radiologica, 2004)