Murine CD4+CD25- cells activated in vitro with PMA/ionomycin and anti-CD3 acquire regulatory function and ameliorate experimental colitis in vivo. - Majowicz, Anna; van der Marel, Sander; te Velde, Anje A.; Meijer, Sybren L.; Petry, Harald; van Deventer, Sander J.; Ferreira, Valerie (BMC Gastroenterology, 2012)