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APA Citation
Brinchmann-Hansen, O., Dahl-Jørgensen, K., Sandvik, L., & Hanssen, K. F. (1992). blood glucose concentrations and progression of diabetic retinopathy: the seven year results of the Oslo study.. BMJ, 304(6818), 19–22. http://access.bl.uk/ark:/81055/vdc_100180891149.0x00002f