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