Underpowered clinical trials: Time for a change
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PII: S0304-3959(09)00418-7
doi:10.1016/j.pain.2009.07.033
© 2009 International Association for the Study of Pain. Published by Elsevier Inc. All rights reserved.
Refers to article:
- A randomized double-blind controlled trial of intra-annular radiofrequency thermal disc therapy – A 12-month follow-up , 03 August 2009

