Patient-centered communication and shared decision making to reduce HbA1c levels of patients with poorly controlled type 2 diabetes mellitus - results of the cluster-randomized controlled DEBATE trial. - Wollny, Anja; Altiner, Attila; Daubmann, Anne; Drewelow, Eva; Helbig, Christian; Löscher, Susanne; Pentzek, Michael; Santos, Sara; Wegscheider, Karl; Wilm, Stefan; Löffler, Christin (BMC Family Practice, 2019)