%33275 0 Leukoencephalopathy,_Progressive_Multifocal 1 N-glycan_trimming_and_elongation_in_the_cis-Golgi 1--0 2 Progressive_trimming_of_alpha-1,2-linked_mannose_residues_from_Man9_or_8_or_7GlcNAc2_to_produce_Man5GlcNAc2 2--0 3 Respiratory_Insufficiency 3--1 3--2