Umbilical cord blood regulatory T-cell expansion and functional effects of tumor necrosis factor receptor family members OX40 and 4-1BB expressed on artificial antigen-presenting cells

Keli L. Hippen, Paul Harker-Murray, Stephen B. Porter, Sarah C. Merkel, Aryel Londer, Dawn K. Taylor, Megan Bina, Angela Panoskaltsis-Mortari, Pablo Rubinstein, Nico Van Rooijen, Tatiana N. Golovina, Megan M. Suhoski, Jeffrey S. Miller, John E. Wagner, Carl H. June, James L. Riley, Bruce R. Blazar