Before revision:  It is achieved by a systematic multi-step approach , that allows 1. to quantify the nonlinearity of coupling , 2. to correct its effects wherever it is caused by simple univariate non-Gaussianity , 3. to potentially localize in space and time any remaining strong sources of this nonlinearity , andfinally, 4. to study the effect the nonlinearity has on global network properties.
After revision:  It is achieved by a systematic multi-step approach , that allows 1. to quantify the nonlinearity of coupling ; correct its effects wherever it is caused by simple univariate non-Gaussianity , 3. to potentially localize in space and time any remaining strong sources of this nonlinearity , andfinally, 4. to study the effect the nonlinearity has on global network properties.