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Gordon Henry Guyatt (born November 11, 1953) is a Canadian physician who is Distinguished University Professor in the Departments of Health Research Methods, Evidence and Impact (formerly Clinical Epidemiology & Biostatistics) and Medicine at McMaster University in Hamilton, Ontario. He is known for his leadership in evidence-based medicine, a term that first appeared in a single-author paper he published in 1991. Subsequently, a 1992 JAMA article that Guyatt led proved instrumental in bringing the concept of evidence-based medicine to the world's attention.[2] In 2007, The BMJ launched an international election for the most important contributions to healthcare. Evidence-based medicine came 7th, ahead of the computer and medical imaging. [3][4] Guyatt's concerns with the role of the medical system, social justice, and medical reform remain central issues that he promoted in tandem with his medical work. On October 9, 2015, he was named to the Canadian Medical Hall of Fame.