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Arends, Suzanne, Anneke Spoorenberg, Pieternella M. Houtman, Martha K. Leijsma, Reinhard Bos, Cees GM Kallenberg, Henk Groen, Elisabeth Brouwer, and Eveline van der Veer. The Effect of Three Years of TNF Alpha Blocking Therapy On Markers of Bone Turnover and Their Predictive Value for Treatment Discontinuation in Patients With Ankylosing Spondylitis: A Prospective Longitudinal Observational Cohort Study. BioMed Central, 2012.

Arends, Suzanne, et al. The Effect of Three Years of TNF Alpha Blocking Therapy On Markers of Bone Turnover and Their Predictive Value for Treatment Discontinuation in Patients With Ankylosing Spondylitis: A Prospective Longitudinal Observational Cohort Study. BioMed Central, 2012.