1. Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz , Graz, Steiermark 8036, Austria
2. Division of General Anaesthesiology and Intensive Care 1, Department of Anaesthesiology and Intensive Care, Medical University of Graz , Graz, Steiermark 8036, Austria
3. Division of Thoracic and Hyperbaric Surgery, Department of Surgery, Medical University of Graz , Graz, Steiermark 8036, Austria