Occurrence of fibromyalgia in patients with ankylosing spondylitis.


INTRODUCTION Ankylosing spondylitis (AS) is a chronic inflammatory disease that affects the axial skeletal system, causing pain and functional incapacity. To measure the impact of AS on patient's life, questionnaires are used to assess disease activity (BASDAI); functional incapacity (BASFI); and quality of life (ASQoL). Fibromyalgia (FM) is one of the most… (More)


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