1. Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
2. Oncode Institute, Netherlands Cancer Institute, Division of Cell Biology, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
3. Department of Radiology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands