x1 = VIIa_TF
x2 = X
x3 = VIIa_TF_X
x4 = VIIa_TF_Xa
x5 = Xa
x6 = TFPI
x7 = Xa_TFPI
x8 = Xa_TFPI_VIIa_TF
x9 = VIIa_TF_Xa_TFPI