Human anti-C1q autoantibodies bind specifically to solid-phase C1q and enhance phagocytosis but not complement activation. - Dijkstra DJ; van de Bovenkamp FS; Abendstein L; Zuijderduijn R; Pool J; Kramer CSM; Slot LM; Drijfhout JW; de Vor L; Gelderman KA; Rooijakkers SHM; Zaldumbide A; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2023)