Opinion
Ankylosing Spondylitis: The Elusive Chase for a Right Diagnosis
But the disease, a type of arthritis that mainly affects the spine, is very rare; out of 1,000 Americans, just two to five people may have it.
But the disease, a type of arthritis that mainly affects the spine, is very rare; out of 1,000 Americans, just two to five people may have it.
