When should an interim analysis be unblinded to the data monitoring committee?
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PII: S0895-4356(09)00211-X
doi:10.1016/j.jclinepi.2009.07.003
© 2010 Elsevier Inc. All rights reserved.
PII: S0895-4356(09)00211-X
doi:10.1016/j.jclinepi.2009.07.003
© 2010 Elsevier Inc. All rights reserved.