1. Department of Plastic, Hand and Reconstructive Surgery, University Medical Center Regensburg, Germany
2. Division of Microsurgery, Pius Branzeu Center for Laparoscopic Surgery and Microsurgery, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
3. Institute of Biomaterial Science and Berlin-Brandenburger Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany
4. HNO Praxis im Zentrum, München, Germany