C4d, a high-affinity LilrB2 ligand, is elevated in Alzheimer’s disease and mediates synapse pruning - Barbara K. Brott; Aram J. Raissi; Kristina D. Micheva; Jost Vielmetter; Monique S. Mendes; Caroline J. Baccus; Jolie Huang; Carla J. Shatz (Proceedings of the National Academy of Sciences, 2025)