0 -> Pneumococci___P Pneumococci___P -> 0 Susceptible_epithelial_cells__EU -> 0 0 -> Epithelial_cells_with_bacteria_attached__Ea Epithelial_cells_with_bacteria_attached__Ea -> 0 0 -> proinflammatory_cytokine__C proinflammatory_cytokine__C -> 0 0 -> Neutrophils__N Neutrophils__N -> 0 0 -> Debris__D Debris__D -> 0