[1] I. Department of Medicine,
[2] University of Cologne,undefined
[3] Joseph-Stelzmann-Str. 9,undefined
[4] D-50924 Köln,undefined
[5] Germany e-mail: jens.chemnitz@uni-koeln.de Tel.: +49-221-4785044 Fax: +49-221-4786417,undefined
[6] Department of Bone Marrow Transplantation and Hematology,undefined
[7] Dr. Ottmar-Kohler-Str. 2,undefined
[8] D-55743 Idar-Oberstein,undefined
[9] Germany,undefined
[10] Department of Pathology,undefined
[11] University of Cologne,undefined
[12] Joseph-Stelzmann-Str. 9,undefined
[13] D-50924 Köln,undefined
[14] Germany,undefined