Asking good clinical research questions and choosing the right study design
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PII: S0020-1383(10)00268-8
doi:10.1016/j.injury.2010.04.016
© 2010 Elsevier Ltd. All rights reserved.
PII: S0020-1383(10)00268-8
doi:10.1016/j.injury.2010.04.016
© 2010 Elsevier Ltd. All rights reserved.