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The who, what, when, where, and why of Cochrane

Society for Participatory Medicine

Over its first 20 years, Cochrane has grown from an initial group of 77 people from nine countries who met at the first Cochrane Colloquium in Oxford in 1993 to over 31,000 contributors from more than 120 countries in 2015, making it the largest organization involved in this kind of work (Allen 2006; Allen 2007; Allen 2011).