The protocol of a clinical effectiveness trial comparing standard step up care, early combination DMARD therapy and early use of TNF inhibitors for the treatment of moderate to severe psoriatic arthritis: the 3-arm parallel group SPEED randomised controlled trial
Watson M., Tillett W., Jadon D., Massa MS., Francis EA., Gullick N., Rombach I., Sinomati Y., Tucker L., Coates LC.