1 Department Gian Filippo Ingrassia, Section of Anatomic Pathology, University of Catania, Catania, Italy. Electronic address: giuseppe.broggi@gmail.com.
2 Division of Hematology, Azienda Ospedaliero-Universitaria Policlinico-Vittorio Emanuele, Catania, Italy.
3 Department Gian Filippo Ingrassia, Section of Anatomic Pathology, University of Catania, Catania, Italy.