1. Department of Pathology, University Hospital Maastricht, Maastricht, the Netherlands
2. Haga Hospital, The Hague, the Netherlands
3. Erasmus MC Rotterdam, Rotterdam, the Netherlands
4. VieCuri Medical Center, Venlo, the Netherlands
5. University Hospital Antwerp, Antwerp, Belgium
6. Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands