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Restrictive pulmonary function is more prevalent in patients with ankylosing spondylitis than in matched population controls and is associated with impaired spinal mobility: a comparative study

Gunnhild Berdal*, Silje Halvorsen, Désirée van der Heijde, Morten Mowe and Hanne Dagfinrud

Arthritis Research & Therapy 2012, 14:R19  doi:10.1186/ar3699

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