@article{article287208f8, title = {Comparison of sustained-release morphine with sustained-release oxycodone in advanced cancer patients}, author = {Lauretti, Gabriela Rocha and Oliveira, G. M. and Pereira, Newton Lindolfo}, year = {2003}, doi = {10.1038/sj.bjc.6601365}, journal = {British Journal of Cancer} }