1. University of Groningen, Faculty of Medical Sciences, Groningen, Netherlands
2. Institute for Diagnostic Accuracy Prof. E. D. Wiersmastraat 5 9713 GH, Groningen, Netherlands
3. Department of Radiology, Haaglanden Medical Centre, The Hague, Netherlands
4. Department of Radiology, NederlandsKankerInstituut, Amsterdam, Netherlands
5. Edinburgh Imaging, Queens Medical Research Institute, University of Edinburgh, Edinburgh, UK