1. Department of Nuclear Medicine, University Hospital Wuerzburg, 97080 Würzburg, Germany
2. Nuclear Medicine, Faculty of Medicine, University of Augsburg, 86154 Augsburg, Germany
3. Department of Nuclear Medicine, Pendik Training and Research Hospital, Marmara University, 34722 İstanbul, Turkey
4. Department of Nuclear Medicine, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
5. Department of Internal Medicine I, Pulmonology, University Hospital Wuerzburg, 97080 Würzburg, Germany
6. Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
7. Department of Internal Medicine II, Gastroenterology, University Hospital Wuerzburg, 97080 Würzburg, Germany
8. Johns Hopkins School of Medicine, The Russell H Morgan Department of Radiology and Radiological Science, Division of Nuclear Medicine and Molecular Imaging, Baltimore, MD 21287, USA