1 Department of Surgery, Medisch Spectrum Twente, Enschede, The Netherlands. anke.christenhusz@mst.nl.
2 Sahlgrenska Centre for Cancer Research, Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy at Gothenburg University, Gothenburg, Sweden.
3 Department of Surgery, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden.
4 Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, The Netherlands.