INS and type 2 diabetes mellitus: The process aimed at gathering experts’ opinions and eliciting consensus regarding the role of basal insulin in the treatment of patients with T2D, with particular focus on the role of metabolic control, the strategies to adopt for basal insulin intensification (timing, add-on vs. switch, free vs. fixed combinations), the strategies for intensification/de-intensification from basal-bolus treatment, and the role of second-generation analogues of basal insulins.