[1] Univ Tubingen, Dept Radiol, Comprehens Canc Ctr CCC Tubingen, DE-72076 Tubingen, Germany
[2] Univ Tubingen, Dept Urol, Comprehens Canc Ctr CCC Tubingen, DE-72076 Tubingen, Germany
[3] Univ Tubingen, Dept Pathol, Comprehens Canc Ctr CCC Tubingen, DE-72076 Tubingen, Germany
[4] German Canc Res Ctr, Dept Radiol, Heidelberg, Germany