1. c/o Forschungsgruppe Experimentelle Chirurgie; Universitäts-Klinikum Düsseldorf; Düsseldorf Germany
2. Clinic and Policlinic for Anaesthesiology and Operative Intensive Care Medicine; University of Bonn; Bonn Germany
3. Clinic for Cardiology, Pneumology & Angiology; University Hospital Düsseldorf; Düsseldorf Germany
4. Institute of Neuro- and Sensory Physiology; Heinrich Heine Universität Düsseldorf; Düsseldorf Germany