1. Department of General, Visceral and Transplant Surgery; University Medicine of the Johannes Gutenberg-University Mainz; Mainz Germany
2. Inomed Medizintechnik GmbH; Emmendingen Germany
3. Fraunhofer Institute for Biomedical Engineering; St. Ingbert Germany
4. Institute for Neurosurgical Pathophysiology; University Medicine of the Johannes Gutenberg-University Mainz; Mainz Germany