1. From the University Eye Hospital Freiburg, Freiburg im Breisgau, Germany;
2. Department of Anaesthesiology and Critical Care Medicine, University Hospital Freiburg, Freiburg im Breisgau, Germany;
3. Department of Experimental Ophthalmology, University Eye Hospital Muenster, Muenster, Germany; and
4. Hertie-Institute for Clinical Brain Research, University of Tuebingen, Tuebingen, Germany.