https://blogs.bmj.com/bmj/2021/07/05/time-to-assume-that-health-research-is-fraudulent-until-proved-otherwise/
Many fake trials come from (Egypt, China, India, Iran, Japan, South Korea, and Turkey), when John Ioannidis, a professor at Stanford University, examined patient data from trials submitted from those countries to Anaesthesia he found that many were false