title: Response criteria and criteria for clinically important improvement: separate and equal?
authors.forename: M M
authors.initials: MM
authors.lastname: Ward
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D013167:Spondylitis, Ankylosing / Q000175:diagnosis* / Q000188:drug therapy; D016896:Treatment Outcome
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal