1. A note on placebo;Pepper;Ann J Pharm,1945
2. Classic conditioning and placebo effects in crossover studies;Suchman;Clin Pharmacol Ther,1992
3. The belief effect;Placebo,2003
4. The placebo effect in healthy volunteers: influence of experimental conditions on the adverse events profile during phase I studies;Rosenzweig;Clin Pharmacol Ther,1993
5. Adverse events in phase one studies: a study in 430 healthy volunteers;Sibille;Eur J Clin Pharmacol,1992