1. University Center for Plastic and Aesthetic, Hand and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
2. Medical Device Lab, Regensburg Center of Biomedical Engineering (RCBE), Faculty of Mechanical Engineering, Ostbayerische Technische Hochschule Regensburg, Regensburg, Germany
3. University Center of Othorhinolaryngo Surgery, University Hospital Regensburg, Regensburg, Germany