2 Division of Hematology, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden.
3 Department of Cellular Therapy and Allogeneic Stem Cell Transplantation, Karolinska Comprehensive Cancer Center, Karolinska University Hospital Huddinge, Stockholm, Sweden.
4 Pediatric Hematology Oncology, Department of Mother and Child, Azienda Ospedaliera Universitaria Integrata, Verona, Italy.
5 Transplantation & Clinical Virology, Department Biomedicine, University of Basel, Switzerland.
6 Clinical Virology, Laboratory Medicine, University Hospital Basel, Switzerland.
7 Infectious Diseases & Hospital Epidemiology, University Hospital Basel, Switzerland.
8 Department of Hematology, Oncology and Palliative Care, Klinikum Ernst von Bergmann, Academic Teaching Hospital of Charité University Medical School, Berlin, Germany.
9 Universitätsklinikum Jena, Klinik für Innere Medizin II, Jena, Germany.
10 Department of Internal Medicine, Infectious Diseases, University Hospital Frankfurt, Goethe University Frankfurt, Germany.
11 Division of Infectious Diseases, University of Genoa (DISSAL), Italy.
12 IRCCS Ospedale Policlinico San Martino, Genova, Italy.
13 Paediatric Immunology, Infectious Diseases & Allergy, Great North Children's Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, United Kingdom.
14 Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom.
15 Paediatric Immunology and HSCT Translational and Clinical Research Institute Newcastle University Great North Children's Hospital Newcastle upon Tyne, United Kingdom.
16 Service des Maladies Infectieuses, Hôpitaux Universitaires de Genève, Switzerland.
17 Service des maladies infectieuses, Département de médecine, Centre hospitalier Universitaire Vaudois et Université de Lausanne, Switzerland.
18 Department of Internal Medicine II, University Hospital Würzburg, Germany.