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U.S. Preventive Services Task Force

Vitamin D With or Without Calcium Supplementation for Prevention of Cancer and Fractures (continued)

Appendix Figure 1. Analytic framework and study questions.

Appendix Figure 1

KQ = key question.
* Go to “Study Selection” section for detailed population of interest.
† Blood 25-hydroxyvitamin D concentration was used as the indicator of vitamin D status.

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