[1] Dept. of General Internal Medicine,
[2] University of Bonn,undefined
[3] D-53113 Bonn,undefined
[4] Germany; Phone: (+49/22) 8287-6789,undefined
[5] Fax: -4323; e-mail: Spengler@uni-bonn.de,undefined
[6] Dept. of Pathology,undefined
[7] University of Bonn,undefined
[8] D-53113 Bonn,undefined
[9] Germany,undefined