Güven Purtaş, H. et al. 2025. Comparison of the frequency of HLA B27 gene positivity and negativity and biochemical laboratory findings in patients diagnosed with ankylosing spondylitis . EXPERIMENTAL BIOMEDICAL RESEARCH. 8, 3 (Jul. 2025), 211–223. DOI:https://doi.org/10.30714/j-ebr.2025.250 .