1. Placebo use in the United Kingdom: results from a National Survey of Primary Care Practitioners;Howick;PLoS One,2013
2. Placebo use in clinical practice: report of the American Medical Association Council on Ethical and Judicial Affairs;Bostick;J Clin Ethics,2008
3. [Efficacy of a non blind placebo prescription];Aulas;Encephale,2003
4. A randomised clinical trial of the effect of informed consent on the analgesic activity of placebo and naproxen in cancer pain;Bergmann;Clin Trials Metaanal,1994