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Mayo Clinic evolved from the frontier practice of Dr. William Worrall Mayo and the partnership of his two sons, Drs. William J and Charles H. Mayo, in the early 1900s. The Mayo brothers invited other physicians to join them, pioneering the private group practice of medicine. Today, with more than 2,000 physicians and scientists, Mayo Clinic is dedicated to providing comprehensive diagnoses, accurate answers and effective treatments. With this depth of medical knowledge, experience and expertise, Mayo Clinic occupies an unparalleled position as a health information resource. Since 1983, Mayo Clinic has published reliable health information for millions of consumers through a varienty of award-winning newsletters, books and online services.