Phase 1/2 trials of donor regulatory T cells for the treatment of steroid-refractory chronic graft-versus-host disease. - Soares MVD; Gómez VE; Azevedo RI; Pereira PNG; Velázquez TC; Mendes L; Alho AC; García-Guerrero E; Garcia-Calderón CB; Tharmaratnam K; Cabral IA; Ribeiro AC; et al. (Blood advances, 2026)