ERBB2 and systemic lupus erythematosus: Luminal A and luminal B share similar network structure although focal adhesion pathway and regulation of actin cytoskeleton pathway can distinguish luminal A from luminal B. And basal-like and HER2+ share similar network structure, although complement and coagulation cascades pathway and systemic lupus erythematosus can distinguish basal-like and HER2+.