1. Department of Plastic and Hand Surgery University Hospital of Lausanne (CHUV), University of Lausanne Lausanne Switzerland
2. Department of Plastic and Reconstructive Surgery University Hospital of Modena Modena Italy
3. Department of Plastic and Hand Surgery Cantonal Hospital of Sierre Sierre Switzerland
4. Department of Plastic and Craniofacial Surgery University Hospital of Dijion Dijion France