In a randomised design , @ patients with long-standing T@DM and @ healthy age - , gender - and BMI-matched control subjects were studied during @-g oral glucose tolerance test ( OGTT ) and three isocaloric ( @kcal ) and isovolaemic ( @ml ) liquid meals : i ) @ g fat , @g carbohydrate and @g protein ; ii ) @g fat , @g carbohydrate and @g protein ; and iii ) @g fat , @g carbohydrate and @g protein .