Inside creep modules, K_0 has units of N[-2]m[4]s[-1], and K_1 has units of N[-1]m[2]degK[-1].
Going back to (Di Luzio and Cusatis, 2013), the units should be: K_0 (N[-1]m[2]s[-1]) and K_1 (N[1]m[-2]degK[-1]), which are inconsistent with the microprestress equation.