แหล่งที่มา WikiPedia: Ankylosing spondylitis http://www.niams.nih.gov/health_info/ankylosing_sp... //www.ncbi.nlm.nih.gov/pmc/articles/PMC1079257 //www.ncbi.nlm.nih.gov/pubmed/14702356 //www.ncbi.nlm.nih.gov/pubmed/16920748 //www.ncbi.nlm.nih.gov/pubmed/25447326 //doi.org/10.1007%2Fs11882-014-0489-6 //doi.org/10.1093%2Frheumatology%2Fkel259 //doi.org/10.1258%2Fjrsm.97.1.10 http://rheumatology.oxfordjournals.org/content/45/... //www.worldcat.org/issn/1462-0324
