Seasonal variation in megaloblastic anaemia.
D000748:Anemia, Macrocytic / Q000453:epidemiology*; D004032:Diet; D005260:Female; D005387:Finland; D005492:Folic Acid; D006801:Humans; D008297:Male; D012621:Seasons; D014805:Vitamin B 12
D005492:Folic Acid; D014805:Vitamin B 12