The Diabetes Therapy Utilization : Researching Changes in A@C , Weight and Other Factors Through Intervention with Exenatide Once Weekly ( DURATION-@ ) randomized clinical trial consisted of a @-week controlled phase ( @ mg of exenatide once weekly vs @ g of exenatide twice daily ) with an open-ended uncontrolled extension ( once weekly exenatide only ) in patients with type @ diabetes mellitus on background glucose-lowering therapies ( April @ , @ , through February @ , @ ) .