Induction of regulatory T cells from mature T cells by allogeneic thymic epithelial cells in vitro. - Yimin Sun; Bao-Sheng Ge; Kasai, Michiyuki; Diffendaffer, Clara; Parks, Nancy; Hanhan Li; Jianxia Peng; Langnas, Alan N.; Yong Zhao (Transplant International, 2006)