[1] Univ Munster, D-4400 Munster, Germany
[2] Univ Essen Gesamthsch, BMT Unit, Essen, Germany
[3] Univ Munich, Munich, Germany
[4] Deutsch Klin F Diagnost, BMT Unit, Wiesbaden, Germany
[5] Univ Hosp, Charite, Berlin, Germany
[6] Univ Regensburg, D-8400 Regensburg, Germany
[7] Univ Cologne, Cologne, Germany