Abstract
Summary
Data are presented to demonstrate that the serum levels of vit. B 12 activity in diabetics with or without retinopathy are widely different. Those with the retinal lesions have a much higher activity (292 ‡ 24) than those without retinopathy (162‡18). This difference is statistically significant.
The possible implication of vit. B12 in this disease is discussed.
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