Mayo Clinic is a not-for-profit medical practice and medical research group based in Rochester, Minnesota, specializing in treating difficult cases (tertiary care). Patients are referred to Mayo Clinic from across the U.S. and the world, and it is known for innovative and effective treatments. Mayo Clinic is known for being at the top of most accredited quality standard listings; for example, it has been near the top of the U.S. News & World Report List of 'Best Hospitals for more than 20 years'. The practice is distinguished by integrated care, and a strong research presence is evidenced by the fact that over 40% of its resources are devoted towards research (rather than just medical practice).
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