Non-randomized and randomized trials
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PII: S0263-9319(09)00157-4
doi:10.1016/j.mpsur.2009.07.002
© 2009 Elsevier Ltd. All rights reserved.
PII: S0263-9319(09)00157-4
doi:10.1016/j.mpsur.2009.07.002
© 2009 Elsevier Ltd. All rights reserved.