EFT will work very well as long as the person is willing to be honest with themselves. They have to actually sit there and "confront" the anxiety. Show it that you can be "still" and prove that it is all just a way for the body to express what it needs.
The body has such great wisdom. Just be willing to listen and then act on it.
Alex. Soon to be a PEAT processor. ( It's like EFT on steroids)