5. RAMRIS, by plotting the change over 8 weeks for each knee independently as we have previously described for anti-TNF effects on bone marrow edema in PsA subjects. The relationship between LN and clinical response to therapy will be assessed from deriving the significance of the correlation coefficient (x2) of LNcap vs DAS28 respectively, as we have done for bone marrow edema vs. DAS28 in PsA subjects on anti-TNF therapy.