I am performing a transcriptomic study of case-control samples. I need to identify genes that are key players in either case or control. Differentially expressed genes is the simplest approach for this. However, they do not take into account the interaction between the genes. Can WGCNA be used for the purpose? On performing WGCNA is it that genes responsible for either case or control are grouped into different modules? Post WGCNA, how can can I relate which module is for case condition and which for control?