Rettinger E, Huenecke S, Bonig H, Merker M, Jarisch A, Soerensen J, Willasch A, Bug G, Schulz A, Klingebiel T, Bader P. Interleukin-15-activated cytokine-induced killer cells may sustain remission in leukemia patients after allogeneic stem cell transplantation: feasibility, safety and first insights on efficacy. Haematologica 2016; 101(4):e153-e156; https://doi.org/10.3324/haematol.2015.138016.