Jay, this is interesting. I'll be interested to see if they do more in depth studies with larger groups of patients.
Here's one from Poland:
Cryotherapy and Histamine Levels Here's one from Finland:
Effectiveness of Different Cryotherapies This one out of Munich included AS patients:
Serial Whole-Body Cryotherapy And another:
Whole-Body Cryotherapy The earliest date on these studies is 2006; the most recent 2010. It appears that there is some interest in this and there may be (MAY be) good reason for it. No pharmaceuticals involved, which is a good thing.
As with any treatment, however, it's up to the patient and whether or not he or she can afford it.
Hugs,