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A recent survey shows that diabetes affect 92.4 million people in mainland China[1],among which 16.9 million have diabetic retinopathy(DR)[2].DR is one of the major causes of blindness in the working age population in both
A recent survey shows that diabetes affect 92.4 million people in mainland China [1], among which 16.9 million have diabetic retinopathy (DR) [2] .DR is one of the major causes of blindness in the working age population in both