Wow again!
Just to clarify, I know what TENS is, I've owned my own unit for a few years and use it frequently. PENS is the Percutaneuous version, and uses acupuncture(-like) needles for a deeper stimulation than TENS. That's about as much as I know about it, from my own web researches.
So, I ask again, what type of doctor would be able to test for the genetic "marker" for AS?
It only hurts when I laugh.
Too bad I find life so funny...