Prolonged neutropenia (<500 cells·mm−3 for >10 days) [10] |
Transplantation (highest risk is with lung transplantation and HSCT) [11–14] |
Prolonged (>3 weeks) and high-dose corticosteroid therapy [10, 15, 16] |
Haematological malignancy (risk is higher with leukaemia) [5, 7] |
Chemotherapy [5, 7, 17] |
Advanced AIDS [18–21] |
Chronic granulomatous disease [22] |
HSCT: haematopoietic stem-cell transplantation.