1. Department of Nuclear Medicine, Heinrich-Heine-University Hospital Düsseldorf, Germany and Department of Nuclear Medicine (KME), Research Centre Jülich, Germany
2. Department of Nuclear Medicine, Hannover University Medical School, Hanover, Germany
3. Institute of Medicine (IME), Research Centre Jülich, Germany
4. Department of Nuclear Medicine, Heinrich-Heine-University Hospital Düsseldorf, Germany and Department of Nuclear Medicine (KME), Research Centre Jülich, Germany