My sister worked on clinical trials in graduate school, and this is one of the many systematic problems she experienced. Other problems: Many clinical trial p

My sister worked on clinical trials in graduate school, and this is one of the many systematic problems she experienced. Other problems: Many clinical trial participants are mentally ill, which effects following instructions, reporting side effects, etc. Many participants participate in multiple clinical trials, so effects/side effects may be partially attributed to the other trials Because the clinical trials often pay a non-trivial amount, people who are poor and desperate will sometimes fake an illness to get into a trial