[1] Free Univ Berlin, Med Clin 3, D-1000 Berlin, Germany
[2] Univ Marburg, Dept Clin Genet, Marburg, Germany
[3] Univ Heidelberg, Inst Human Genet & Anthropol, D-6900 Heidelberg, Germany
[4] Univ Ulm Klinikum, Dept Human Genet, Ulm, Germany
[5] Univ Munich, Klinikum Grosshadern, Med Klin 3, D-8000 Munich, Germany
[6] Univ Frankfurt, Dept Hematol, D-6000 Frankfurt, Germany
[7] Univ Vienna, Med Biol Inst, Vienna, Austria