[1] Institute of Diagnostic Radiology,
[2] Heinrich Heine University,undefined
[3] P. O. Box 101007,undefined
[4] D-40001 Düsseldorf,undefined
[5] Germany,undefined
[6] Department of Urology,undefined
[7] Heinrich Heine University,undefined
[8] P. O. Box 101007,undefined
[9] D-40001 Düsseldorf,undefined
[10] Germany,undefined
[11] Institute for Social Medicine and Epidemiology,undefined
[12] Charité University Hospital,undefined
[13] D-10098 Berlin,undefined
[14] Germany,undefined
[15] Department of Biometrics and Epidemiology,undefined
[16] Diabetes Research Institute at Heinrich Heine University,undefined
[17] D-40225 Düsseldorf,undefined
[18] Germany,undefined