P.07.1 SWITCHING FROM INFLIXIMAB ORIGINATOR TO A FIRST BIO SIMILAR IS SAFE AND EFFECTIVE. A SINGLE CENTER SERIES WITH THROUGH LEVELS AND ANTI-DRUG ANTIBODIES DETERMINATION. Issue 2 (15th March 2018) - Daperno, M.; Guiotto, C.; Italia, A.; Lavagna, A.; Negri, A.; Ercole, E.; Cosimato, M.; Rigazio, C.; Rocca, R.