1. Department of Orthopedic Surgery, Microsurgery Research Laboratory, Mayo Clinic, Rochester, MN
2. BG Trauma Center Ludwigshafen, Hand, Plastic and Reconstructive Surgery‐Burn Center, Plastic and Hand Surgery, The University of Heidelberg, Ludwigshafen, Germany
3. Plastic‐, Hand and Reconstructive Microsurgery, Trauma Center Murnau Professor‐Kuentscher‐Strasse Murnau, Germany