Raamatud Stephen J Walters
How to Display Data
Jenny V Freeman, Michael J Campbell, Stephen J Walters
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Quality of Life Outcomes in Clinical Trials and Health-Care Evaluation: A Practical Guide to Analysis and Interpretation
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How to Design, Analyse and Report Cluster Randomised Trials in Medicine and Health Related Research
Stephen J Walters, Michael J Campbell
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Medical Statistics: A Textbook for the Health Sciences
Michael J Campbell, Stephen J Walters, David Machin
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