Diabetic retinopathy:  lack of correlation with vitamin B12 excretion.
D001692:Biological Transport; D048909:Diabetes Complications; D003930:Diabetic Retinopathy; D004194:Disease; D012160:Retina; D012164:Retinal Diseases; D014805:Vitamin B 12 / Q000652:urine*
D014805:Vitamin B 12
DIABETES MELLITUS/complications; RETINA/diseases; VITAMIN B12/in urine