Reply to “A combination treatment approach and cord blood stem cell transplant for blastic plasmacytoid dendritic cell neoplasm” and to “A low-grade B-cell lymphoma with prolymphocytic/paraimmunoblastic proliferation and IRF4 rearrangement” Dendritic cell leukemia - Livio Pagano; Caterina Giovanna Valentini; Fabio Facchetti (Haematologica, 2013)