Wow, not too many people have heard of AS so I am happy to know someone I can talk to and ask questions. We are getting ready to put a therapy pool in to help strengthen my spine and joints. You see more hydrotherapy spas and pools in Europe than you do in the US so our pool company is looking at some of the ones that NFL teams or physical therapy companies have. We don't have anything like that near me so it will be a big investment but water exercise is the only I can handle. I am going to send you a message about the Autoimmune Hepatitis.