There's a period during which some people get a medicine and some people don't. It's random. It's basically a pragmatic way of running a randomized trial in the post-market world. It is a new idea. It's been explored for years, but it hasn't been applied very often. But there are provinces now looking into using these pragmatic trials in an environment where we don't know the value and the safety of the medicine.
On April 8th, 2008. See this statement in context.