Canadian study found no significant differences in effectiveness or tx survival among different TNFi, or in nr-axSpA or AS. Failure of 1st TNFi didn't diminish effectiveness or drug survival of additional TNFi. Abs 0938 #ACR21 #RheumNow @RheumNow https://t.co/u1efnfv2zA https://t.co/qsJw3nA9qn