Equation Icon  c0 = 0.759 μm ∕W , c1 = 0.016μm ∕W , c2 = − 0.044 μm ∕W , c3 = − 0.011μm ∕W , c4 = 0.002 μm ∕W , c5 = 0.004μm ∕W . (4.13 )