Progression of IA according to the risk group, defined by the number of risk factors per patient. Risk factors include (1) more than 20 days of neutropenia after transplantation; (2) advanced underlying disease at transplantation; (3) CMV disease; (4) time interval from start of AFT and transplantation less than 6 weeks; (5) bone marrow or cord blood as the source of stem cells; and (6) grades II to IV aGVHD that required high-dose steroids (prednisone or equivalent at ≥ 2 mg/kg for > 10 days) with or without ATG for treatment. Risk-group categories were low risk, 0 to 1 risk factors; intermediate risk, 2 to 3 risk factors; and high risk, 4 to 6 risk factors. Numbers in parentheses indicate number of patients who had progressive IA/number of patients in this risk group; 2-year cumulative incidence. Tick marks indicate censored patients.