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  1. Stem cells: What they are and what they do - Mayo Clinic

  2. Stem Cell Research: Uses, Types & Examples - Healthline

  3. Stem cells: Sources, types, and uses - Medical News Today

  4. Stem cell | Definition, Types, Uses, Research, & Facts | Britannica

  5. Stem Cell - The Definitive Guide - Biology Dictionary

  6. Stem Cell Basics | STEM Cell Information - National Institutes of Health

  7. Stem Cells: Types, What They Are & What They Do - Cleveland Clinic

  8. What Are Stem Cells, and What Are Their Purposes?

  9. Stem Cells - Definition, Types, Applications, Importance ... - Examples

  10. Do You Know the 5 Types of Stem Cells? - BioInformant

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