They were eligible when they had suboptimum glycaemic control ( HbA@c @-@ @ % -LSB- @-@ mmol/mol -RSB- ) despite maximum tolerated doses of metformin alone or with a sulfonylurea for at least @ months , a stable bodyweight for at least @ months , and a BMI of @-@ kg/m ( @ ) ( @-@ kg/m ( @ ) in South Korea and Taiwan ) .