1. Center for Plastic, Aesthetic, Hand & Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
2. Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V., Dortmund, Germany
3. Department of Radiotherapy, University Hospital Regensburg, Regensburg, Germany
4. Department of Clinical Chemistry and Laboratory Medicine, Transfusion Medicine, University Hospital Regensburg, Regensburg, Germany
5. Department of Otorhinolaryngology, Ludwig-Maximilians-University Munich, Munich, Germany