Vitamin B12 serum levels and diabetic retinopathy.
D001769:Blood; D045728:Corrinoids; D003920:Diabetes Mellitus / Q000097:blood*; D003930:Diabetic Retinopathy; D004194:Disease; D006801:Humans; D012160:Retina; D012164:Retinal Diseases; D014805:Vitamin B 12 / Q000097:blood*
D045728:Corrinoids; D014805:Vitamin B 12
BLOOD; DIABETES MELLITUS/blood in; RETINA/diseases; VITAMIN B12/in blood