megaloblastic anemia hereditary disease nutritional deficiency disease pernicious anemia https://github.com/monarch-initiative/mondo/issues/9097 https://www.malacards.org/card/pernicious_anemia Biermer anemia SCTID:84027009 intrinsic factor deficiency ICD10CM:D51.0 OMIM:170900 EFO:0005576 acquired pernicious anemia juvenile onset pernicious anemia UMLS:C0002892 Biermer disease Orphanet:120 Addison anaemia Addison-Biermer anaemia MEDGEN:1531 anaemia pernicious MONDO:0008228 Addison anemia anemia pernicious NCIT:C2871 pernicious anemia acquired pernicious anaemia GARD:0027356 Megaloblastic anemia caused by vitamin B-12 deficiency due to impaired absorption. The impaired absorption of vitamin B-12 is secondary to atrophic gastritis and loss of gastric parietal cells. Biermer anaemia ICD9:281.0 Addison's anemia juvenile onset pernicious anaemia MESH:D000752 Addison-Biermer anemia DOID:13381