DavidP, (or anyone else that recalls it)
I recently ran across an article that was written in very layman's terms that suggested those with emphasis of bad repute for ERAP1 were more likely affected with Axial involvement whereas if the bad repute was stronger on the Il23R side, it most likely affected peripheral areas (I know you touched on that above but there was another article that went more into it).
I'm hoping with your expertise of research you may have crossed paths with such an article. I'm terrible about reading something of interest and not printing it and then can't find it to reference it.