1. Laboratory of Hygiene and Environmental Protection, School of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
2. Bone Marrow Transplantation Unit, Department of Hematology, Evangelismos Hospital, 10676 Athens, Greece
3. Department of Hematology, School of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
4. Department of Hematology, School of Medicine, University of Thessaly, 41110 Larisa, Greece
5. Department of Clinical Therapeutics, School of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece