Trial schema. RIC using 80 cGy TLI for 10 days and ATG 1.5 mg/kg on days 1-5, followed by peripheral blood progenitor cell infusion on day 0. Rituximab infusion (375 mg/m²) was infused on days 56, 63, 70, 77. Cyclosporine and mycophenolate mofetil were used as primary GVHD prophylaxis. Triangles indicate time points for peripheral blood immune analyses.