1. Section of Infectious Diseases; Division of Pulmonology; Medical University of Graz; Graz; Austria
2. Institute of Hygiene, Microbiology and Environmental Medicine; Medical University of Graz; Graz; Austria
3. Division of Haematology; Medical University of Graz; Graz; Austria
4. Division of Paediatric Haematology/Oncology; Medical University of Graz; Graz; Austria