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  1. Clinical Research What is It - Johns Hopkins Medicine

  2. What Are Clinical Trials and Studies? - National Institute on Aging

  3. Clinical research - Wikipedia

  4. The Basics | National Institutes of Health (NIH)

  5. Clinical trials - World Health Organization (WHO)

  6. What is Clinical Research? | National Institutes of Health (NIH)

  7. What is clinical research and why are we focussing on it?

  8. Definitions of Clinical Research and Components of the …

  9. Clinical Research | NICHD - Eunice Kennedy Shriver National …

  10. What is Clinical Research? - National Institute of Mental Health