Gain of function mutant of complement factor B K323E mimics pathogenic C3NeF autoantibodies in convertase assays. - Urban, Aleksandra; Borowska, Anna; Felberg, Anna; van den Heuvel, Lambertus; Stasiłojć, Grzegorz; Volokhina, Elena; Okrój, Marcin (Autoimmunity, 2018)