WGCNA coexpression of deisased related module

Question

[mahmudaga]

i am performing WGCNA to determine shared molecular signature between two disease. I am able to construct a co-expression module after combining multiple expression datasets including both diseased and control groups, but now i am struggling to select the co-expression modules related to a particular disease. i came across a research paper recently (https://doi.org/10.3390/biomedicines9010034). I need some help if anyone can explain me the WGCNA part of this paper.

thanks