1. Clinic for Radiology, University Hospital Münster, Münster, Germany.
2. Department of Nuclear Medicine, University Hospital Münster, Münster, Germany.
3. Institute of Biostatistics and Clinical Research, University of Münster, Münster, Germany.
4. West German Cancer Center; University Hospital Münster, Münster, Germany.
5. European Institute for Molecular Imaging; University of Münster, Münster, Germany.