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. 2008 Nov 11;99(10):1593–1599. doi: 10.1038/sj.bjc.6604750

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Copyright © 2008 Cancer Research UK

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Visual analogue scale (VAS) on effects of clinical trial (CT) and conventional therapy. (A) Distribution. The size of solid circle indicates the number of patients. (B) The benefit of participation in clinical trials. A positive value indicates a higher expectation of benefits for the clinical trial therapy. Zero points indicate equal expectation of both therapies.