Work in Fabrizio d'Adda di Fagagna's laboratory is supported by the Associazione Italiana per la Ricerca sul Cancro, AIRC (application 12971), Cariplo Foundation (grant 2010.0818 and 2014-0812), Fondazione Telethon (GGP12059 and GGP17111), Association for International Cancer Research (AICR-Worldwide Cancer Research Rif. N. 14-1331).