A total of 120 patients with type 2 diabetes whose estimated glomerular filtration rater ( eGFR ) was 60 mL/min 1.73 in2 , were divided randomly into three groups , basic treatment group ( n = 41 ) , standard DCXC therapy group ( n = 39 , 2-g corbrin capsules , 3 times/d , 3 days before and after angiography ) , and intensive DCXC therapy group ( n = 40 , 3-g corbrin capsules , 3 times/d , 3 days before and after angiography ) .