1. Unit of Haematology, IRCCS ‐ Istituto Giannina Gaslini Genoa Italy
2. Pediatric Hematology and Oncology Unit, Department of Hematology, Spirito Santo Hospital Pescara Italy
3. Department of Pediatric Onco‐Hematology University Hospital Parma Italy
4. Pediatric Hematology and Oncology Unit ARNAS (Azienda di Rilievo Nazionale ad Alta Specializzazione) Ospedale Civico Palermo Italy
5. Department of Pediatric Onco‐Hematology Meyer Children's Hospital Florence Italy
6. Oncology‐Haematology and Bone Marrow Transplantation Unit, Children's Hospital Brescia Italy
7. AORN (Azienda Ospedaliera Rilievo Nazionale) Santobono Pausillipon Naples Italy
8. Pediatric Ematologi and Oncology Unit, Azienda Policlinico‐Vittorio Emanuele, University of Catania Catania Italy
9. Unit of Pediatrics and Neonatology, “Monsignor Dimiccoli” Hospital Barletta Italy
10. Unit of Immune and Infectious Disease, University Department of Pediatrics DPUO, Children's Hospital Bambino Gesù, IRCCS Rome Italy
11. Department of Systems Medicine, University of Rome Tor Vergata Rome Italy
12. Institute of Maternal and Child Health, IRCCS Burlo Garofalo Trieste Italy
13. Department of Pediatric Hematology, San Gerardo Hospital Monza Italy
14. MBBM (Monza e Brianza per Bambino e Mamma) Foundation, Department of Pediatrics, University of Milano ‐ Bicocca Monza Italy
15. Department of Pediatric and Public Health Sciences, University of Torino Turin Italy
16. Pediatric Onco‐Hematology Unit, University Hospital of Padua Padua Italy