Cite
MLA Citation
Muhammad Mamdani et al.. “Observational study of upper gastrointestinal haemorrhage in elderly patients given selective cyclo-oxygenase-2 inhibitors or conventional non-steroidal anti-inflammatory drugs.” BMJ, vol. 325, no. 7365, 2002, pp. 624–. http://access.bl.uk/ark:/81055/vdc_100177569342.0x000034