What is ankylosing spondylitis?What are the main symptoms of ankylosing spondylitis?How is ankylosing spondylitis diagnosed?What are some of the main medical treatments for ankylosing spondylitis?Have any supplements been studied for ankylosing spondylitis?How could diet affect ankylosing spondylitis?Are there any other treatments for ankylosing spondylitis?What causes ankylosing spondylitis?What are the other types of spondyloarthritis?What are the symptoms of inflammatory back pain?What is a low-starch diet?