[1] Department of Trauma-, Hand- and Reconstructive Surgery, Westfaelische Wilhelms University Muenster, Waldeyer Str. 1, Muenster
[2] Department of General and Visceral Surgery, Westfaelische Wilhelms University Muenster, Muenster
[3] Department of Anesthesiology, Anesthesia, Intensive Care, Emergency and Pain Medicine, University Medicine Greifswald, Greifswald