Pernicious anemia and rheumatoid arthritis.
D000752:Anemia, Pernicious / Q000453:epidemiology / Q000235:genetics*; D001172:Arthritis, Rheumatoid / Q000235:genetics*; D004739:England; D005260:Female; D005756:Gastritis / Q000235:genetics; D006801:Humans; D008297:Male; D014852:Wales