IL6 and major depressive disorder: Depression linked with ↑ risk of heart failure and small vessel strokeDepression and CVD—↑ levels of IL-6, CRP, and triglyceridesVariant serotonin transporter gene (5-HTTLPR) ↑ risk of depression after MI, poor response to antidepressantsVariant serotonin receptor gene (5-HT2A)—↑ risk of depression after MIIL-1 gene—↑ risk of depression after MI, pro-inflammatory response