Lipid therapy in patients with diabetes mellitus: A joint statement by the Commission on Lipid Metabolism and the working group Heart and Diabetes of the German Diabetes Society (DDG), the Section Diabetes, Obesity and Diabetology and Metabolism of the German Society of Endocrinology (DGE), the working group Heart and Diabetes of the German Society of Cardiology (DGK) and the joint working group Heart–Hormones–Diabetes of DGK, DGE and DDG.