@conference{19111,
  author = {Kamper S.},
  title = {Trial methodology and patient characteristics did not influence the size of placebo effects on pain in randomized controlled trials},
  year = {2008},
  journal = {IASP Placebo Special Interest Group, Symposium on the Placebo Effect},
  month = {-34369393620},
  address = {Copenhagen, Denmark},
  language = {eng},
}