1. Organic Chemistry I - Bioorganic Chemistry, Institute of Chemistry of New MaterialsUniversity of Osnabrück Barbarastrasse 7 D-49069 Osnabrück Germany
2. Institute for Anatomy and Cell Biology, Department of Medical Cell BiologyPhilipps-University Marburg Robert-Koch-Strassse 8 D-35032 Marburg Germany
3. Department of NeurosurgeryPhilipps-University Marburg, Baldingerstrasse D-35032 Marburg Germany