Warning about side effects can increase their occurrence: an experimental model using placebo treatment for sleep difficulty
Journal of Psychopharmacology (2012) - Comment
pubmed: 22992377  doi: 10.1177/0269881112458730  issn: 1461-7285  issn: 0269-8811 

Ben Colagiuri, Kari McGuinness, Robert A Boakes, Phyllis N Butow