1. AstraZeneca. Iressa prescribing information, 2010.
2. GlaxoSmithKline. Votrient prescribing information, 2009.
3. Assessing the quality of reports of randomized clinical trials: is blinding necessary?;Jadad;Control Clin Trials,1996
4. Review Manager (RevMAn) [computer program]. Version 5.1. Copenhagen: The Nordic Cochrane Centre, The Cochrane Collaboration, 2011.
5. Deeks J, Higgins J, Altman D. Analysing data and undertaking meta-analyses. In: Higgins J, Green S editors. Cochrane handbook for systematic reviews of interventions version 5.1.0. The Cochrane Collaboration, 2011. Available from .