Fuchaloem, Chingching. “How to Early Diagnosis Ankylosing Spondylitis?”. Srinagarind Medical Journal 22, no. 2 (November 4, 2013): 195–199. Accessed May 6, 2024. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13139.