Genome-wide DNA methylation analysis in ankylosing spondylitis identifies HLA-B*27 dependent and independent DNA methylation changes in whole blood (2019)
https://pubmed.ncbi.nlm.nih.gov/31128893/

2019 Update of the American College of Rheumatology/Spondylitis Association of America/Spondyloarthritis Research and Treatment Network Recommendations for the Treatment of Ankylosing Spondylitis and Nonradiographic Axial Spondyloarthritis (2019)
https://pubmed.ncbi.nlm.nih.gov/31436036/

Functional intraepithelial lymphocyte changes in inflammatory bowel disease and spondyloarthritis have disease specific correlations with intestinal microbiota (2018)
https://pubmed.ncbi.nlm.nih.gov/30029674/