The cumulative incidence of clinical chronic GVHD among all 37 bone marrow (BM) and all 37 PBSC recipients. The “×” tick marks denote patients who died or relapsed. The “‖” tick marks denote patients who have not developed clinical chronic GVHD by the time of the last follow-up. Note that the horizontal axis scale between 0 and 2 years differs from that between 2 and 8 years posttransplant.