1. Institute of Pathology, University Bern, Bern; Switzerland
2. Institute of Pathology, Friedrich-Alexander University Erlangen-Nuremberg; Erlangen Germany
3. Medical Clinic 1, Friedrich-Alexander University Erlangen-Nuremberg; Erlangen Germany
4. Institute of Pathology, University Hospital Dresden Carl Gustav Carus; Dresden Germany
5. Institute of Pathology, Hospital Aschaffenburg; Aschaffenburg Germany
6. Institute of Pathology, Hospital Bayreuth; Bayreuth Germany
7. Department of Medical Biology, Faculty of Health Sciences; University of Tromsø; Tromsø Norway