[1] Democritus Univ Thrace, Univ Hosp Alexandroupolis, Dept Hematol, Alexandroupolis, Greece
[2] Univ Athens, Laikon Gen Hosp, Dept Hematol, Athens 11528, Greece
[3] Attikon Univ, Dept Internal Med 2, Hematol Unit, Gen Hosp, Athens, Greece
[4] G Gennimatas Hosp, Dept Clin Hematol, Athens, Greece
[5] Aristotle Univ Thessaloniki, Hippokrat Hosp, Propedeut Dept Internal Med 2, GR-54006 Thessaloniki, Greece
[6] Univ Hosp Heraklion, Dept Hematol, Iraklion, Greece
[7] Aristotle Univ Thessaloniki, AHEPA Hosp, Dept Hematol, GR-54006 Thessaloniki, Greece