Noel, M., Chambers, C.T., McGrath, P.J., Klein, R.M., Stewart, S.H. (2012). The influence of children’s pain memories on subsequent pain experience. Pain 153, 1563-1572. doi: 10.1016/j.pain.2012.02.020. http://www.ncbi.nlm.nih.gov/pubmed/22560288.