[1] Univ Athens, Dept Biol, Sect Cell Biol & Biophys, GR-15701 Athens, Greece
[2] Laikon Hosp, PGH Athens, Sect Prenatal Diag, Athens, Greece
[3] Hop Bicetre, Hematol Serv, Assistance Publ Hopitaux Paris, Le Kremlin Bicetre, France
[4] INSERM U473, Le Kremlin Bicetre, France