It depends upon the specific question or hypothesis being studied. For demonstrating safety and efficacy of a new drug, then of course the double blind placebo controlled randomized trial is the gold standard. Other designs might be more appropriate for different questions.
-
-
This Tweet is unavailable.
-
- Show replies
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.
