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John R. Brinkley (July 8, 1885 - May 26, 1942) became nationally known as the "goat gland doctor" for his controversial medical practice that promised virility for his male patients. He was a pioneer in radio broadcasting and advertising, as he promoted his services to his large listening audience. Despite detractors and critics in the medical community thoroughly discrediting his methods, Brinkley operated clinics and hospitals in several states for two decades.

John R. Brinkley (July 8, 1885-May 26, 1942) became nationally known as the "goat gland doctor" for his controversial medical practice that promised virility for his male patients. He was a pioneer in radio broadcasting and advertising, as he promoted his services to his large listening audience. Despite detractors and critics in the medical community thoroughly discrediting his methods, Brinkley operated clinics and hospitals in several states for two decades.