"Platelets are activated during P. aeruginosa infection and mice depleted of platelets display markedly increased mortality and impaired bacterial clearance. CXCL4 deficiency impairs bacterial clearance and lung epithelial permeability. CXCL4 deficiency selectively regulates chemokine production. CXCL4 deficiency reduces platelet-neutrophil interactions in blood following P. aeruginosa infection."xsd:string