A quantitative assessment of the evolution of cerebellar syndrome in children with phosphomannomutase-deficiency (PMM2-CDG) - Natalia Lourdes Serrano; Victor De Diego; Daniel Cuadras; Antonio F. Martinez Monseny; Ramón Velázquez-Fragua; Laura López; Ana Felipe; Luis G. Gutiérrez-Solana; Alfons Macaya; Belén Pérez-Dueñas; Mercedes Serrano; CDG Spanish-Consortium (Orphanet Journal of Rare Diseases, 2017)