1. Institute of Pathology, University of Bern, Bern, Switzerland
2. Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
3. Promed Laboratoire Médical, Marly, Switzerland
4. Institute of Pathology, Universty Hospital Basel, Basel, Switzerland
5. Division of General Thoracic Surgery, Inselspital University Hospital Bern, Bern, Switzerland
6. Institute of Pathology, Technische Universität München, München, Germany