Institution: | 1. Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Medical Center of Leipzig, Leipzig, Germany 2. Department of General, Visceral, and Transplant Surgery, University Medical Center of Mainz, Mainz, Germany 4. 1st Department of Medicine, Medical Center of Worms, Worms, Germany 3. Institute of Quality Management, University Medical Center of Mainz, Mainz, Germany
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