Apoptotic cell fragments locally activate tingible body macrophages in the germinal center by Grootveld, AK, Kyaw, W, Panova, V, Lau, AWY, Ashwin, E, Seuzaret, G, Dhenni, R, Bhattacharyya, ND, Khoo, WH, Biro, M, Mitra, T, Meyer-Hermann, M, Bertolino, P, Tanaka, M, Hume, DA, Croucher, PI, Brink, R, Nguyen, A, Bannard, O, Phan, TG