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We would like to thank Chattopadhyay et al for their interest in our article presenting the low incident rate of vertebral fractures in an early axial spondyloarthritis (axSpA) population. We have read with interest their comments regarding the external validity of the data we are presenting.1 2
We would like to highlight that the manuscripts the authors are referring to in their letter were focusing only in patients with either very long-standing disease (22.5 years in the Montala study3) or with radiographic involvement (ie, radiographic axSpA, also referred as ankylosing spondylitis) in …
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