1. Department of Surgical Sciences, Plastic and Maxillofacial SurgeryUppsala University Hospital Uppsala Sweden
2. Center of Anatomy and Cell BiologyMedical University of Vienna Vienna Austria
3. Division of Plastic and Reconstructive Surgery, Department of SurgeryMedical University of Vienna Vienna Austria
4. Department of OtorhinolaryngologyUppsala University Hospital and Department of Surgical Sciences, Uppsala University Uppsala Sweden
5. Department of Surgery, Plastic and Reconstructive SurgeryHospital of Divine Savior Vienna Austria