1. Department of Plastic, Hand and Reconstructive Microsurgery, BG Trauma Center, Murnau, Germany
2. Department of Plastic Surgery, Diakonie-Krankenhaus, Bad Kreuznach, Ethiopia
3. Department of Plastic Surgery, Cure Hospital, Addis Abeba, Ethiopia
4. Department of Maxillofacial Surgery, Ludwig-Maximilian-University, Munich, Germany