@article{articlee142a6f4,
title   = {Tramadol plus metamizole combined or not with anti-inflammatory drugs is clinically effective for moderate to severe chronic pain treatment in cancer patients},
author = {Flor, Patrícia Bonifacio and Yazbek, Karina Velloso Braga and Ida, Keila Kazue and Fantoni, Denise Tabacchi},
year = {2013},
doi = {10.1111/vaa.12023},
journal   = {Veterinary Anaesthesia and Analgesia}
}