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 A., Gullick N., ROMBACH I., SINOMATI Y., TUCKER L., COATES LC.