To wrap up in terms of the evidence, the evidence is actually quite compelling and it's been summarized in many publications that look at it. They do make a change, people do use them, but we need to make sure that we situate them in such a way that they can virtualize some of the aspects of care that are now falling on our health care system, so that we can empower people to live healthily.
On April 23rd, 2013. See this statement in context.