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J Clin Epidemiol. 2008 Mar;61(3):203-4. doi: 10.1016/j.jclinepi.2007.08.002.

Interim monitoring of efficacy data is important and appropriate.

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1
MRC Clinical Trials Unit, Cancer Group, 222 Euston Road, London NWI 2DA, UK. matthew.sydes@ctu.mrc.ac.uk
PMID:
18226741
DOI:
10.1016/j.jclinepi.2007.08.002
[Indexed for MEDLINE]
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