Repeated infusions of donor-derived cytokine-induced killer cells in patients relapsing after allogeneic stem cell transplantation: a phase I study oleh Martino Introna, Gianmaria Borleri, Elena Conti, Marta Franceschetti, Anna Maria Barbui, Raewyn Broady, Erica Dander, Giuseppe Gaipa, Giovanna D’Amico, Ettore Biagi, Matteo Parma, Enrico M. Pogliani, Orietta Spinelli, Donatella Baronciani, Anna Grassi, Josée Golay, Tiziano Barbui, Andrea Biondi, Alessandro Rambaldi