DOI:
10.1055/s-00000165
Evidence-Based Spine-Care Journal
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References
Cummings SR, Browner WS, Hulley SB.
Conceiving the research question.
In: Hulley SB, Cummings SR, Browner WS, Grady DG, Newman TB, , eds.
Designing Clinical Research.
Philadelphia: Lippincott Williams and Wilkins; 2007: 17-26
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