BibTex format
@article{Droney:2008,
author = {Droney, J and Ross, J and Gretton, S and Welsh, KI and Sato, H and Riley, J},
journal = {Supportive Care in Cancer},
pages = {453--459},
title = {Constipation in cancer patients on opioids},
volume = {16},
year = {2008}
}