Memory-like inflammatory responses of microglia to rising doses of LPS: key role of PI3Kγ - Lajqi, Trim; Lang, Guang-Ping; Haas, Fabienne; Williams, David L.; Hudalla, Hannes; Bauer, Michael; Groth, Marco; Wetzker, Reinhard; Bauer, Reinhard (Frontiers in immunology, 2019)