1. Department of Anesthesiology; Intensive Care Medicine and Pain Therapy; University Hospital Giessen and Marburg; Campus Giessen Giessen Germany
2. Institute of Physiology; Justus-Liebig-University; Giessen Germany
3. Institute and Policlinic for Occupational and Social Medicine; Justus-Liebig University; Giessen Germany
4. Department of Cardiovascular Surgery; University Hospital Giessen and Marburg; Campus Giessen Giessen Germany