Macrophages that have ingested apoptotic cells in vitro inhibit proinflammatory cytokine production through autocrine/paracrine mechanisms involving TGF-beta, PGE2, and PAF - Fadok,V.A.; Bratton,D.L.; Konowal,A.; Freed,P.W.; Westcott,J.Y.; Henson,P.M. (J Clin Invest, 1998)