[1] Univ Hamburg, Hosp Eppendorf, Bone Marrow Transplantat Unit, Dept Oncol Haematol, D-20246 Hamburg, Germany
[2] Univ Hamburg, Hosp Eppendorf, Blood Transfus Serv, D-20246 Hamburg, Germany
[3] Univ Hamburg, Hosp Eppendorf, Dept Obstet & Gynaecol, D-20246 Hamburg, Germany
[4] Otto Von Guericke Univ, Dept Haematol & Oncol, Magdeburg, Germany