_:vb50937487 "A vitamin B12 deficiency that is characterized by megaloblastic anemia due to the absence of gastric intrinsic factor which results in abnormal vitamin B12 absorption."^^ . _:vb50937487 . _:vb50937487 "url:http://omim.org/entry/261000?search=261000&highlight=261000"^^ . _:vb50937487 "url:http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=332"^^ . _:vb50937487 . _:vb50937487 . _:vb50937487 "url:https://www.ncbi.nlm.nih.gov/pubmed/14695536"^^ . _:vb50937487 . _:vb50937487 . _:vb50937487 .