1 Department of Medicine and Medical Specialties, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ca’ Granda Foundation Maggiore Policlinico Hospital, Milan, Italy
2 University of Cyprus Medical School, Nicosia, Cyprus
3 Department of Haematology, University College London Hospitals NHS Foundation Trust, London, UK
4 Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon