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)