CTLA-4 and PD-L1 checkpoint blockade enhances oncolytic measles virus therapy - Engeland, Christine Elisabeth; Veinalde, Rūta; Bossow, Sascha; Lutz, Diana; Umansky, Viktor; Weichert, Wilko; Jäger, Dirk; Kalle, Christof von; Ungerechts, Guy (Molecular therapy, 2014)