Mayo Clinic is a world famous non-profit medical group, built in 1846, set out clinics, hospitals, medical research and education in one. The Mayo Clinic comprises an elite team of medical professionals in the United States that provides comprehensive diagnoses, accurate medical solutions and effective treatments for patients with various diseases. The concept of the Mayo Clinic is "patient-centered value" More than 42,000 medical staff, including 2,500 doctors and scientists. The entire medical system at Mayo Clinic includes more than 70 hospitals in Minnesota, Iowa and Wisconsin.