Eleonora Tresoldi, Ilaria Dell’Albani, Angela Stabilini, Tatiana Jofra, Andrea Valle, Nicola Gagliani, Attilio Bondanza, Maria Grazia Roncarolo, Manuela Battaglia. Reply to Comment on “Stability of human rapamycin-expanded CD4+CD25+ T-regulatory cells” Haematologica 2011;96(9):1357–65. Haematologica 2012;97(5):e17-e17; https://doi.org/10.3324/haematol.2012.064246.