[1] Univ Bonn, Inst Pharmaceut, PharmaCtr Bonn, D-53121 Bonn, Germany
[2] Helmholtz Zentrum Dresden Rossendorf, Inst Radiopharmaceut Canc Res, D-01314 Dresden, Germany
[3] Jacobs Univ Bremen, Sch Engn & Sci, D-28725 Bremen, Germany
[4] Rhein Westfal TH Aachen, Fac Med, Dept Mol Pharmacol, D-52074 Aachen, Germany