1. Department of Orthopedic Surgery, Microvascular Research LaboratoryMayo Clinic200 1st street SW55905, Building: MS‐3‐85 Rochester Minnesota
2. Department of Orthopedic Surgery, Orthopedic Research LaboratoryMayo ClinicRochester Minnesota
3. Department of Hand‐, Plastic‐and Reconstructive Surgery, ‐Burn Center‐, BG Trauma Center LudwigshafenUniversity of HeidelbergHeidelberg Germany