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2. https://clinicalepigeneticsjournal.biomedcentral.com/articles/10.1186/s13148-021-01218-y#Tab1

3. Metformin reduces all-cause mortality and diseases of ageing independent of its effect on diabetes control: A systematic review and meta-analysis

4. Metformin and Aging: A Review

5. The Potential of Resveratrol to Act as a Caloric Restriction Mimetic Appears to Be Limited: Insights from Studies in Mice

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7. Wikipedia Bibliography:

   1. Randomized controlled trial

   2. https://en.wikipedia.org/wiki/Breast_cancer  :

      https://en.wikipedia.org/wiki/Breast_cancer

   3. Metformin

   4. Statistical-significance

   5. https://en.wikipedia.org/wiki/Intent-to-treat  :

      https://en.wikipedia.org/wiki/Intent-to-treat