Real-world outcomes of sitagliptin and sitagliptin/metformin single-pill combination treatment in diverse type 2 diabetes populations (DIVERSITY study) - Andrej Janez; Mirjana Bojic; Tomislav Bozek; Zdravko Kamenov; Tatjana Milenkovic; Gabriela Radulian; Tamás Várkonyi (Frontiers in Clinical Diabetes and Healthcare, 2026)