Structure of the decision tree to compare the cost-effectiveness of two approaches for the management of PFN in the hematological patient. SAEI approach, the SAEI approach or DDAT approach; AT, antifungal therapy; EAT, empirical antifungal therapy; IDSA approach, the IDSA approach or standard approach based on the indication of empirical antifungal therapy; IFI, invasive fungal infection.