_:vb50937144 . _:vb50937144 . _:vb50937144 . _:vb50937144 "A congenital disorder of glycosylation characterized by under-glycosylated serum glycoproteins."^^ . _:vb50937144 "url:https://ghr.nlm.nih.gov/condition/pmm2-congenital-disorder-of-glycosylation"^^ . _:vb50937144 . _:vb50937144 . _:vb50937144 "url:http://en.wikipedia.org/wiki/Congenital_disorder_of_glycosylation#Classification"^^ . _:vb50937144 .