DIEBOLDER, C. A., F. J. BEURSKENS, R. N. DE JONG, R. I. KONING, K. STRUMANE, M. A. LINDORFE,M. VOORHORST, D. UGURLAR, S. ROSATI, A: 'Complement is activated by IgG hexamers assembled at the cell surface', SCIENCE, vol. 343, no. 6176, 2014, pages 1260 - 1263, XP055268751, DOI: 10.1126/science.1248943