Before revision: QuotationsSome statements about the role of placebos in doctor patient relationship are: Cooper (1823, p. 259): " When applying the compound decoction of the sarsaparilla ... in cases of irritable ulcer, ... some think it placebo; others have a very high opinion of its efficacy ... when it is used after the use of mercury, it diminishes the irritability of the constitution, and soon soothes the system into peace".
After revision:    after the use of mercury, it diminishes the irritability of the constitution, and soon soothes the system into peace".