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Comparative effectiveness reviews need to pay as much attention to external validity as to internal validity risks of bias.

Peter P Tugwell, André A Knottnerus, and Leanne L Idzerda

J Clin Epidemiol 64(11):1163-5 (2011) PMID 21959052

Copyright © 2011 Elsevier Ltd. All rights reserved.

DOI: 10.1016/j.jclinepi.2011.08.005
Version: za2963e q8za5 q8zb2 q8zcd q8zd6 q8ze8 q8zfd q8zg8

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