title: Effect of smoking on diabetic retinopathy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003930:Diabetic Retinopathy / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012907:Smoking; D013997:Time Factors