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Designing clinical research / Stephen B. Hulley, Steven R. Cummings, Warren S. Browner, Deborah G. Grady, Thomas B. Newman.
- 610.72 H9139 2007
- Hulley, Stephen B.,
- Lippincott Williams & Wilkins,
- [2007] ©2007
- Philadelphia, PA :
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Modern epidemiology / Kenneth J. Rothman, Sander Greenland ; with 15 contributors.
- 614.4 R8467m 1998a
- Rothman, Kenneth J.,
- Lippincott Williams & Wilkins,
- Philadelphia :