
By BY GINA KOLATA from NYT Health https://ift.tt/3bsbXL8

Follow Laura, Bill, and Mark as they make a commitment to a healthier year in 2021.
Ankylosing spondylitis (AS) is a rare type of arthritis in the spine whose main symptom -- back pain -- is a common, everyday complaint. That’s just one reason why so many people with AS wait years for a correct diagnosis.

