1. Department of Orthopedic SurgeryMicrovascular Research Laboratory, Mayo Clinic200 First Street SW Rochester Minnesota
2. Department of Plastic and Reconstructive SurgeryAmsterdam UMC, University of AmsterdamAmsterdam Netherlands
3. Department of Hand, Plastic, and Reconstructive SurgeryBurn Center, BG Trauma CenterLudwigshafen Germany
4. Department of Plastic SurgeryUniversity of HeidelbergHeidelberg Germany