1. Author information: Priv. Doz. Dr. med. Christian Matthias Ehrnthaller; Senior Physician, Section Head 3-D Surgery and Clinical Tissue Regeneration, Specialist for Orthopaedic Surgey, Trauma Surgery and Emergency Medicine, Certified Foot and Ankle Surgeon. 2. Education: Medical School 2002–2008: University of Hamburg and Ulm, Germany. 3. Work experience: Residency at University of Ulm; Department of Trauma; Prof. Gebhard. 2009–2016: Senior Physician at University of Munich, Department of Trauma; Prof. Böcker. 2016–ongoing: Section Head 3-D Surgery and Clinical Tissue Regeneration, leading foot and ankle surgeon Campus Großhadern. 4. Research Interests: trauma Immunology, stem cell therapy, biomechanics, foot and ankle surgery. 5. Memberships: German Trauma Association, AO Foundation, German Foot and Ankle Society, German Society for Extremity-Lengthening and Reconstruction.