CD8A and eosinophilia-myalgia syndrome: Peritoneal immune cells, including macrophages [8,23] , neutrophils [24,25] , natural killer cells [26,27] , dendritic cells[28], B cells [29–31] , and CD8+ T cells[32] reportedly take part in the progression of EMS by regulating cytokine production, angiogenesis, and the inflammatory response.