Spinal Radiographic Progression in Patients with Ankylosing Spondylitis Treated with TNF-α Blocking Therapy: A Prospective Longitudinal Observational Cohort Study

• Fiona Maas ,

  * E-mail: f.maas@umcg.nl

  Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Anneke Spoorenberg,

  Affiliations Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands, Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands

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• Elisabeth Brouwer,

  Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Reinhard Bos,

  Affiliation Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands

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• Monique Efde,

  Affiliation Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands

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• Rizwana N. Chaudhry,

  Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Nic J. G. M. Veeger,

  Affiliation Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Peter M. A. van Ooijen,

  Affiliation Department of Radiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Rinze Wolf,

  Affiliation Department of Radiology, Medical Center Leeuwarden, Leeuwarden, The Netherlands

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• Hendrika Bootsma,

  Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Eveline van der Veer,

  Affiliation Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Suzanne Arends

  Affiliations Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands, Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands

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