1. Department of Pharmaceutical Technology, University of Regensburg, Regensburg, Bavaria 93053, Germany
2. Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Bavaria 86156, Germany
3. Department of Nuclear Medicine and Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Bavaria 97080, Germany
4. Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-0082, Japan