1. Division of Plastic & Maxillofacial Surgery Uppsala University Hospital Uppsala Sweden
2. Division of Reconstructive Microsurgery, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, College of Medicine Chang Gung University Taoyuan Taiwan
3. Department of Surgery Cedars‐Sinai Medical Center Los Angeles California USA
4. Department of General Surgery Chang Gung Memorial Hospital Taoyuan Taiwan
5. Center for Tissue Engineering Chang Gung Memorial Hospital Taoyuan Taiwan
6. Section of Plastic Surgery, Department of Surgery University of Michigan Ann Arbor Michigan USA