DOI: 10.1055/s-00000024

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References

Bassler D, Montori V. M., Briel M, Glasziou P, & Guyatt G. (2008)
Early stopping of randomized clinical trials for overt efficacy is problematic.

Journal of clinical epidemiology
61 (03) , 241-246.
DOI: 10.1016/j.jclinepi.2007.07.016.

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