“…Regulatory T cells (Tregs) are important in immunity [14][15][16][17], and alloantigenspecific immunosuppression is critical for organ transplantation [7,10,16,[18][19][20]. To date, our group has focused on applications of UV irradiation [21][22][23][24][25]. To induce alloantigen-specific Tregs, high-dose UV-B irradiation accompanied by alloantigen immunization is required [5,7,10,11,[26][27][28][29].…”