... Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Function Index; BASMI, Bath Ankylosing Spondylitis Metrology Index; CRP, C-reactive protein; ESR, erythrocyte ... al.: Two-yearmaintenance of efficacy and safety of infliximab in the treat-ment of ankylosing spondylitis. Ann Rheum Dis 2005,64:229-234.6. Braun J, Baraliakos X, Brandt J, Listing J, Zink A, ... S, Jenkinson T, Kennedy LG, Whitelock H, Gaisford P,Calin A: A new approach to defining disease status in ankylos-ing spondylitis: the Bath Ankylosing Spondylitis Disease Activ-ity Index....