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About
In some phase 2 and all phase 3 clinical trials, patients are assigned to groups that receive different treatments. The process of assigning patients to these groups by chance is called randomization. Learn how researchers randomly assign clinical trial participants to different treatment groups in order to prevent bias in the results.
- Archive
- Wikimedia Commons, in Wikimedia Commons
- Licence or status
- Public domain, as the Wikimedia Commons states it.
- Rights statement
- Public domain
- Credit
- National Cancer Institute
- Who can watch
- The archive gives no rating. Invisible Network shows it to Teens profiles and older, judged from its collection and subjects. How films are placed