@article{articlec7e34cf4,
title   = {The cognitive effects of opioids in chronic non-cancer pain},
author = {Kendall, Sally Elizabeth and Sjøgren, Per and Pimenta, Cibele Andrucioli de Mattos and Højsted, Jette},
year = {2010},
doi = {10.1016/j.pain.2010.05.012},
journal   = {Pain}
}