Here's a mention of it in this article. https://www.theglobeandmail.com/world/article-blood-and-bure...
Another report, or is it the same one as referenced above?
Until a completely new sample of victims with no relation is taken and the study replicated against a completely new control group with no relation, it has very little value. And even if it did, it still wouldn't be conclusive - psychosomatic illness can have physiological effects.
The only way is to prove the mechanism of the attack - which for microwave attacks is readily done with wearable RF devices - and to find a physiologically plausible mechanism for that exact observed attack. Which should be pretty easy to do, and which the CIA hasn't done.
Would make sense if it was an own equipment malfunction.