After an initial balance favoring collagen formation and mineralization, bone turnover markers return to pre-treatment levels during long-term TNF-α inhibition in patients with ankylosing spondylitis

• Mark Siderius ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing – original draft

  * E-mail: m.siderius@umcg.nl

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

  https://orcid.org/0000-0002-1236-4341

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• Anneke Spoorenberg,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Visualization, Writing – review & editing

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

  https://orcid.org/0000-0001-8850-8578

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• Frans G. M. Kroese,

  Roles Conceptualization, Writing – review & editing

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

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• Eveline van der Veer,

  Roles Conceptualization, Investigation, Methodology, Resources, Writing – review & editing

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

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• Suzanne Arends

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Visualization, Writing – review & editing

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

  https://orcid.org/0000-0002-4422-7640

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