1. Department of Plastic and Hand Surgery, Burn Center, University Clinics, RWTH Aachen University, Pauwelsstrasse 30, 9th Floor, B2 R11, 52074 Aachen, Germany
2. Center for Engineering in Medicine/Surgical Services, Massachusetts General Hospital, Harvard Medical School and Shriners Hospitals for Children, Boston, MA 02114, USA
3. Department of Trauma Surgery, Plastic and Reconstructive Surgery, University Clinics, Goettingen, Germany