Fresenius Medical Care provides products and services to refresh renal disease patients and their kidneys. The company is one of the largest dialysis providers in the world. Its staff treats approximately 2.8 million patients a year at some 3,600 dialysis clinics worldwide, about half of which are based in the US. In addition to performing dialysis, Fresenius Medical Care makes dialysis machines, dialyzers, and other supplies that are sold to hospitals and clinics through internal sales efforts and independent distributors. It also offers dialysis support services including laboratory testing, renal drug distribution, and disease management programs. Fresenius SE owns a controlling stake in Fresenius Medical Care.