Smith, JA (January 2015). "Update on ankylosing spondylitis: current concepts in pathogenesis". Current allergy and asthma reports. 15 (1): 489. doi:10.1007/s11882-014-0489-6. PMID25447326.
Smith, JA (January 2015). "Update on ankylosing spondylitis: current concepts in pathogenesis". Current allergy and asthma reports. 15 (1): 489. doi:10.1007/s11882-014-0489-6. PMID25447326.