Raper C G, Choudhury M
J Clin Pathol. 1978 Jan;31(1):44-6. doi: 10.1136/jcp.31.1.44.
Folic acid deficiency is very common in elderly patients who have a mean red cell volume greater than 94 fl. Eighteen out of 40 elderly patients with red cell macrocytosis who initially had normal red cell folate and serum B12 levels subsequently developed folic acid deficiency.
叶酸缺乏在平均红细胞体积大于94飞升的老年患者中非常常见。40例红细胞大细胞性贫血的老年患者中，最初红细胞叶酸和血清维生素B12水平正常，但随后有18例出现了叶酸缺乏。
