A total of 37 patients ( 50.6 9.8 y ) with well-controlled diabetes ( HbA1C < 8.5 % ) were randomized to receive either PUFA containing eicosapentaenoic acid ( 2160 mg ) and docosahexaenoic acid ( 1440 mg ) daily or an isocaloric , identical placebo containing corn oil for 48 weeks under CONSORT guidelines .