; BMI , @kg/m ( @ ) ; fasting plasma glucose , @ mmol/l and HbA@c , @mmol/mol ( @ % ) ) were randomised to two-paired study days comprising a @-h @g oral glucose tolerance test ( OGTT ) with paracetamol ( A ) and an isoglycaemic intravenous ( i.v. ) glucose infusion ( B ) , with ( A@ + B@ ) and without ( A@ + B@ ) preceding administration of the DPP@ inhibitor sitagliptin .