Chronic exposure to Interleukin-6 amplifies the response to Toll-like receptor ligands: implication on the pathogenesis of macrophage activation syndrome - De Benedetti Fabrizio; Bracci-Laudiero Luisa; Petrini Stefania; Vivarelli Marina; De Pasquale Loredana; Scianaro Roberta; Carvello Francesco; Strippoli Raffaele (BMC, 2011)