In case of Aspergillus positive culture and/or positive PCR in respiratory samples, additional tests were performed on serum, i.e., detection of GM (Platelia GM Aspergillus, Biorad, Marnes-la-Coquette, France), Aspergillus PCR and detection of anti-Aspergillus antibody by ELISA (Platelia IgG Aspergillus, Biorad) and in-house immunoelectrophoresis.