Mechanisms of the placebo response and their impact on clinical trials and clinical practice

aPain Management Research Institute, University of Sydney and Royal North Shore Hospital, Pacific Highway, St Leonards, 2065 Sydney, NSW, Australia bDepartment of Neuroscience, Clinical and Applied Physiology Program, University of Turin Medical School, Turin, Italy *Corresponding author. Tel.: +61 294607095. E-mail: [email protected] Submitted November 30, 2004; accepted December 6, 2004.