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Ankylosing spondylitis (AS) is a crippling form of arthritis that generally strikes young people in their teens and twenties, sometimes even earlier. Left untreated, it causes pain, disability and can eventually cause the spinal vertebrae to fuse together forming one brittle bone, often in a stooped over position. To view Multimedia News Release, go to http://multivu.prnewswire.com/mnr/spondylitis/43152/