1. Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
2. Department of Plastic, Reconstructive and Aesthetic Surgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
3. Department of Pathology with Sections Molecular Pathology and Cytopathology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany