Journal of Anesthesia

, Volume 26, Issue 5, pp 802–803

Internal validity and the risk of bias: a case for a comprehensive review

Letter to the Editor

DOI: 10.1007/s00540-012-1420-8

Cite this article as:
Berger, V.W. J Anesth (2012) 26: 802. doi:10.1007/s00540-012-1420-8


Allocation Concealment Biases Masking Randomized Trials 

Copyright information

© Japanese Society of Anesthesiologists (outside the USA) 2012

Authors and Affiliations

  1. 1.Biometry Research Group, National Cancer Institute, and UMBCBethesdaUSA

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