>That placebo effect study is 20 years old.
Has it been contradicted anywhere? I don't see any other studies that have looked into it.
>Most of the included trials in the meta analysis are 10-20 years old as well.
The meta-analysis is from less than 6 months ago, and looked at all the studies available, which cover a range from recent to 10-20 years ago. That is normal for a meta-analysis, so I'm not sure why you're making it sound like it's out of date.
>The BBC article is about a new device.
Yes, there seems to be one study underway, which is still recruiting: