Rilonacept (IL-1 TRAP) for treatment of colchicine resistant familial mediterranean fever (FMF): a randomized, multicenter double-blinded, alternating treatment trial by Reiff AO, Pashinian N, Weisman MH, Barron KS, Park G, Huang B, Giannini EH, Spalding SJ, Hashkes PJ, Samuels J, Wright D, Kastner DL, Lovell DJ