Before revision: It is often attributed to William Osler (1901) but without a precise source .Charles Murphy, "Guest blog", Emergency Medical Journal, March 30, 2014Donald L. Blanchard, Daniel M. Albert, "Historical Excerpts and Quotations Corner", American Academy of Ophthalmology, May 9, 2018 The first to recognize and demonstrate the placebo effect was English physician John Haygarth in 1799.
After revision: , and it does not appear in his publicationsIt is often attributed to William Osler (1901) but without a precise source .Charles Murphy, "Guest blog", Emergency Medical Journal, March 30, 2014Donald L. Blanchard, Daniel M. Albert, "Historical Excerpts and Quotations Corner", American Academy of Ophthalmology, May 9, 2018 The first to recognize and demonstrate the placebo effect was English physician John Haygarth in 1799.