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Fig. 2 | BMC Rheumatology

Fig. 2

From: Radiographic involvement of cervical facet joints in ankylosing spondylitis: a longitudinal analysis in correlation with vertebral body lesions

Fig. 2

Flowchart of included ankylosing spondylitis patients with spinal radiographic data. Several spinal radiographs within the given follow-up period were included per patient. (aSpinal radiographs were collected during any time point within the corresponding follow-up period. bCervical facet joints that were not visible on lateral radiographs or could not be evaluated due to spinal surgery)

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BMC Rheumatology

ISSN: 2520-1026

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