1. Department of Haematology Guy's and St Thomas' NHS Foundation Trust London UK
2. Division of Hematology and BMT Unit A.O.U. Policlinico “G.Rodolico‐San Marco” Catania Italy
3. Department of Scienze Mediche Chirurgiche e Tecnologie Avanzate “G.F. Ingrassia” University of Catania Catania Italy